The video documents MrBeast (Jimmy Donaldson) and his crew, led by Karl Jacobs, spending seven consecutive days inside a 1,000‑year‑old underground salt‑mine city. Each day a new famous YouTuber (e.g., JDub, Sam & Colby, Kai Cenac, Logan Paul, Big Star, Speed, the Sidemen, IShowSpeed) is brought down via an elevator to join the group. The team explores uncharted tunnels, confronts fear‑of‑heights challenges, discovers secret doors, and stages prank wars that culminate in a makeshift mayor election (Kai) and a brief dictatorship. Throughout the stay they build a camp, create a shower, play soccer, golf, and a high‑altitude catch game, and they continuously promote MrBeast’s Feastables chocolate‑sea‑salt bars and a limited‑time Zaxby’s “MrBeast box” giveaway. The narrative blends adventure, comedy, competition, and product placement, ending with the group exiting the underground city after a final campfire and reflections on the experience.
Chapters
We are spending the next 7 days in this massive underground city.
How does this place exist?
Although it may look like something straight out of the future, this city is built inside of a mine dating back over 1,000 years ago. And with countless uncharted tunnels and chambers, who knows what horrors we'll run into. These are the stairs that descend into the city. How old are these stairs? Older than us. All right, now that we're down here, look at how high up the ceiling is.
Wow.
Oh, we are 400 feet underground right now, and somehow this village village just exists. This is nuts. During World War II, when Romania was getting bombed, thousands of people would hide here. And now just a bunch of YouTubers live here. And soon enough, we found a great place to spend the night. I think we should camp here. You're the boss. Our stuff is all the way up there. With our home base decided, we all went up to grab our bags and using all of our collective brainpower, we discovered the best way to get them down to camp. Woo! Oh, that's awesome. That's dead on. We just finished fishing everything out of the water. Our food for The challenge consists of bagged food, and we each brought a personal bag. What's in yours, Karl?
Let's look at somebody else's.
You get the point. You guys want to know what's crazy? We've barely seen any of this underground city. The walls that surround us are actually hiding a bunch of tunnels. There's even a chamber bigger than the one we're in now. Where? What? However, what these guys don't know is that every single day I'm bringing a famous YouTuber to help us explore these tunnels. But the more YouTubers that joined us, the deeper the city would fall into chaos.
You just got here, bro.
We're going to bed at a reasonable hour because I have a big surprise It's 2:00 in the morning. That's ominous. Day 1 in the underground city was a success. We'll see you in the morning.
Good morning!
Oh boy. It's going to be a great day. First thing in the morning, I took everyone to the elevator for my big announcement. Starting today, every single morning, a famous YouTuber is going to be joining us. Our surprise guest coming down from the surface is JDub!
Welcome to the underground city. Yeah. Well, this is legit a city. Whoa, there's even a Ferris wheel here.
But that's not all. So we have not been up these stairs yet. And is that not the most ominous stairs you've ever seen in your life?
Whoa.
Boys, come over here. Laserbeam has a fear of heights. Why are we doing this to him? Today we're conquering your fear of heights. Oh my gosh. Now he's so calm. If I'm going to die, I'm going to die. I'm not going to worry about it. Oh, God. All right, we have a lantern to go exploring. I feel so much safer now. Well, don't get too comfortable because just around the corner Around another corner we found this menacing door— Access Forbidden! Whoa!
Oh heck no! I'll check it out.
Nah nah nah nah nah nah nah nah.
Alright guys, looks safe.
Are we sure there's not like people living down here or something? Only one way to find out. This does feel like a very haunted area. These boards either held up a sign that said "Don't Enter" that someone ripped down...
They definitely did.
Or they're just here for decoration. I think they were here for decoration.
Follow me.
This doesn't look creepy at all. Hey everyone, for 1,000 years they've harvested salt from the salt mine. This is a dark chocolate sea salt Feastables bar. Hear me out. Why don't we put more salt on our sea salt bar? Right from the sauce.
That's so good.
Whoa. It tastes really good. And after climbing multiple sets of stairs— Where is this leading us? I'm not sure. Going where we probably shouldn't. Wait, what does this say? Do not pass. What does that mean? Karl, put your hands like this. Dude, we probably can't put this on camera. As eerie as those tunnels were, the creepiest were still yet to come. But for now, we headed back to camp. As you can see, Jadeon joined us in the bed ring. Tomorrow's going to be a fun day. We have a super special guest. We'll see you in the morning. All right. It's the start of day 3, and you know what that means. Let's go see who the special guest of the day is. Send them down!
I see a shadow. There he is.
Is it Kai?
Maybe it's Speed? I see 2 shadows!
There's 2 of them! Today, the 2 guests are—
Sam and Colby!
If you don't know already, Sam and Colby specialize in exploring abandoned and haunted places. So it will be interesting to see what they think when we explore this 1,000-year-old tunnel system.
Are we going?
See how high the ceiling is? Well, apparently there's like a window where you can look down. And I want to see Landon's reaction because he's terrified of heights.
Oh!
Meanwhile, the others are going to upgrade our base camp.
All right, all right. You'll do stuff here and then you'll do stuff over there. Oh, I get it.
You're supervisor.
Yeah. Yeah. Yeah. Okay.
Has no clue what's going on.
Tells us what to do. Let's get to work. Let's get to work.
As we went deeper than before, I never could have guessed how sketchy these tunnels would get. I think Sam and Colby should lead the way because they have more experience. We love creepy holes, you know?
That makes sense. Yeah.
Lead the way.
You're getting further and further away.
I'm right behind you. Oh, we got two ways.
This way. Whoa! Carl! I got Colby so good.
I scared the crap out of him. Anyways, we kept walking until we eventually We eventually came across this ominous staircase.
This is sketch. Oh, there's just a gigantic cross up here.
Wait, wait, wait.
Really?
What do we make of this cross? The one thing that we know about these salt mines is there is a legend that there was one spirit seen and they created an altar at that location because it's where the hauntings are. This is the spot. That sounds awesome. Let's keep going.
Yo, that's the hole that leads to the camp.
Oh, is that the hole? I feel like there's a fence for a reason.
Should I go over there?
I'll watch from here.
Dude, I can see our camp. Look!
John!
Whoa, they're way up above us.
How's it going?
We have shower, boys!
They just yelled, "We have a shower." How did you do that?
First, we'll make a shower head out of the cap, and then we'll hang our water jug.
Landon, come check this out. I'll, uh, I'm coming. Landon, you can't be this afraid of heights. I'm coming, bro. I'm coming. This is okay. No, no, no one touch me. We're overcoming our fears. Having now explored 50% of the mines and with a way to wash our reeking bodies, this underground city was finally thriving. But there was still plenty to do because by the next morning we had to welcome our day 4 special guest coming down the elevator.
Wait, they're short.
Is the biggest Twitch streamer on the planet, Kai Cenac. Welcome to the Underground City!
Yay!
All right, Kai, I want you to jump and stomp as loud as you can.
What the heck?
Kai, now that you're here, we have a big family.
And nothing's gonna get between any of us.
Is that foreshadowing?
Bro, you just got here! Oh, God! Kai.
I specifically saved one secret tunnel for you.
So let's go explore it.
So using these boats, we crossed the underground lake. That's right, a lake that's underground. And on the other side, our next set of tunnels was through this hole in the wall. Yeah, actually, Karl should go first.
I'll go first. Whoa. There's a door in the hole. What is behind that door? We got to get in there.
That is awesome.
You got it. You got it. You got it. You got it. Oh my God.
So after using Sean's back, we were ready to explore. See you, Sean.
Bye, Sean. I see this in movies all the time. When we get past the door, we're going to die.
What's the game plan? You got to go straight.
You gotta go make a left, then right is always right, so make that U-turn half circle opposite of your left-hand side. But once you go straight, you take 5 steps back, okay?
So after trekking through this sketchy tunnel—
Whoa! Whoa! Wait, what happened? What?
It literally just opened up into a giant dark void. They told me there was another cavern just as big as the other one, so I thought it'd be fun if we brought the world's brightest flashlight.
Dude, what? What?
That's wild. Hey, wait, be careful.
There are ledges here.
Wait, you're going to jump?
Bye, guys!
Kai, where are you going?
Bye!
I don't know if it's safe for him. Hey, this is cool.
Together, together. Whoa. Oh, hello! Hello! It sounds like I'm over there.
Now they're all down there in the middle of the cavern. I'm going to turn the flashlight off to scare them.
Ready? Hey, where are you going? Come on, come on!
They're leaving us.
Hurry, come on, come on, come on, come on, come on!
Go, go, go!
Go, go, go, go, go! Block him in. He's leaving us! Later, nerds! Open it!
You're going to break Karl's arm.
Whoa, whoa!
Yeah, I'm letting go.
Hey, man.
What?
What's what? Was that trying to leave us? No. I heard you say, "Later, losers." Who? You! No. He tried to trap us in there for a night.
No, no, you can stay down there. So with tensions running high after a long day of exploring, we decided to turn in for the night. But Karl was about to strike again, this time with Gideon's help.
We're going to prank the rest of the team. Everyone's asleep right now. We're going to have this mannequin standing on the bridge and have a speaker behind it.
We're going to play Kai's song, "Busan Rolling Avalanche." We ready? I think we're ready. Are we being attacked?
They're playing my song. That's your song? Yeah.
You see that light over there? All the way at the top?
At least it's a good song though.
Whoever has done this has made a great enemy in their life. What are you gonna do tomorrow to get revenge? Oh boy. I will dedicate my entire life to their destruction. I will wipe them and their entire family from existence. Lines are being drawn. Enemies are being formed. These last few days are gonna be interesting. I'm gonna try to go back to bed. I'm the only one awake right now. Everyone is still still asleep after what Kyle did last night. But I think our guest is about to arrive. They're coming down right now.
Yo, what's good, bro?
It's Logan Paul. Usually Jimmy's here to give it to her, but he's asleep right now. We can go wake him up. Oh, I'm gonna do that. Yeah, you want to go do that?
Hey yo, good morning, Logang! What's poppin'?
Kayla's excited to see you, man.
I can tell.
Our day 5 guest is WWE superstar Logan Paul.
Let's go!
This video is just me seeing how many famous people I can drag in this pit. Hey guys, you notice someone who's not here? Karl. Gideon. Last night it was Karl and Gideon just like running pranks on us. And I think I can speak for everyone here. They're getting exiled today. This was Karl's bed. He won't be using this anymore. I hope where he's sleeping now is comfortable. I was sick of that guy anyway. All right, laser beam's going a little crazy. One final thing. I think Karl is still asleep. We're going to go wake him up.
Wakey wakey. I just woke up to Logan Paul.
Karl, I got a surprise for you. You might be a bit sleepy, but just come up here, buddy. So I threw your bed into the water.
Dude, I hate this underground city, bro.
With the prank war actually starting to bother some people, Kai decided to step up and become the mayor of the city.
Does anybody object of me being mayor?
I vote that the shortest person here be the mayor.
I don't object.
To establish some order in the city, Mayor Kai first punished Gideon and Karl for last night's prank. And I've got to warn you, with With the city's population having grown to now 9 YouTubers, everything you're going to witness from here on out is just pure chaos.
All right, you'll sleep in the elevator.
Elevator?
If they're in the elevator, how do we get up? We got to take 15 flights of stairs, Kai? You're not thinking. Bro, you just got here, bro. You just got here last night. Why is he the mayor? I'm just going to say it.
All right, we need to start acting on these orders. You guys go ahead and carry your stuff to the elevator.
Enjoy your dictatorship.
Hey, enjoy your elevator.
Yeah, enjoy your elevator, buddy. Bro, me laying down this way is looking like a penthouse. And me laying like this is—
Still an elevator. Now that the criminals are gone, Kai, what do you want to do?
First things first, I think we should have a place just for storage. It should go right there. So just to clarify, we're moving our belongings away from our beds for no reason?
No, because Kai told us. Honestly, this does nothing. Now we just have to work for our clothing. All right, maybe making Kai mayor wasn't such a good idea. So after doing some more of Kai's ridiculous demands, the Day 1 boys and I set off on our daily exploration. All right, we'll be back in around 2 hours. So while we've explored just about every tunnel and room in this underground city, I have a special one here that I really want to show you guys.
All right.
See this dead end right here?
Yeah.
What if I told you it's a fake dead end?
No!
What is—
There you go. What?
It was a fake door that led to a giant tunnel.
Whoa!
Where does the tunnel lead to then?
Let's find out.
All right. Get this. The tunnel was so long, we literally had to run down it.
Still going. This is the longest tunnel I've ever seen in my life. I see the light. And at the end of the tunnel, I built a Zach's Zaxby's.
Yo! Brand new MrBeast box available in every single Zaxby's that comes with the Feastables bar. And meanwhile, back at camp, the other boys had way too much time on their hands.
I think we move all their beds to the bridge, bro. That's the day one bridge. This is the new gen house. Let's do it. Let's go.
I got Jimmy's and then I'll grab Blazer's.
I've never been this happy in my entire life.
The MrBeast box comes with great chicken, your favorite sides from Zaxby's, and it's about to disappear forever. So if you haven't tried it, go get it now. Zaxby's also has a ton of sauces. Dude, this is good.
This is good sauce. Yeah, right here. Perfect.
For the first 30 days in October, we're giving away $10,000 in a random drawing for people who buy Feastables. And on Halloween night, we're giving one lucky winner $1 million. Just post a photo of you holding a Feastables bar and #TagFeastables. The Feastables bars in these MrBeast boxes can also be used to enter the giveaway. I'm so happy right now. Don't miss out. Go and get yourself a MrBeast box from Zaxby's while you still can. I think we're all on the same page. The other people in the city do not need to know about this.
We did not eat Zach's bees.
Now, what I failed to realize is what would happen when you leave a bunch of content creators alone with nothing to do for hours. Why do you guys have ski masks on?
While you guys were gone, we made sure that we made this a better city. So we're going to have a town hall meeting to discuss the new changes that we've made.
Okay.
All right.
This better be good.
Are you guys ready?
Kai, what the heck is going on?
Welcome to your new city.
This is our current state.
Everything is just so messy. It looks bad, right? Go to the next line. We let the new gen sleep here from now on.
So what about the day one-ers?
You guys are now on the bridge. Well, we have a master bedroom. Somebody's sleeping on the raft.
All right, I think I've seen enough. Day one-ers, come on. Come on. I'm taking my day one-ers.
Come on.
Come on. Let's go. Have fun.
Yeah, where y'all going? No, we can't let them get back to the base before us. They're right. They're right. No, no, no, no, no, no, no, no. Shut up, mouthful. Shut up. Go!
Guys, we all wanted to talk to you about something. What? You've turned into a dictator.
What? Honestly, really quickly, we got to move our beds over here. I quit, bro. I hate being mayor, bro. You got to make all the rules of this stuff and everybody got to follow it. Ah, ah, I'mma go back.
You good? As a show of peace, I brought you some food. If you guys follow me here, I brought you all lunch, Lee. I get a prime end Feastables?
It's nice. The cheese tastes like actual cheese. It's good. Fire.
It actually is so good. So after a day of establishing a new leader, toppling a corrupt government, and then becoming friends again, we decide to call it a night.
All right. Good night, you hooligans. We'll see you tomorrow.
Good morning, everybody. Will everyone please meet me at the elevator? Who do you guys think is the next inhabitant of the underground city?
I think it's IShowSpeed. He's literally streaming right now in Romania.
It's the entire Sidemen.
Could be Jinxy.
All right, let's see who it is. That's Speed.
That's Speed. I can tell.
Send them down.
That's a massive box. It's a girl. Oh, it could be a girl.
For our day 6 special guest of the 7 Days Underground City.
All right, here we go. Ah! Ah! Ah! Ah! What is that gigantic box? Man, you're going to be excited for this box.
All your favorite things are in here. Which way do you want me to open it? Just open it.
Ah! Let's go!
For day 6, we actually have 2 guests, Big Star and Speed. So boys, welcome to the underground city. Yeah, we've done this tour like 6 or 7 times at this point, right? All right. Follow me, boys. If you guys want, we can hit the highest point of the cave. As long as you promise me it won't suck.
It's not too high though. Wait, is that water? That jump, bro. That's water though. I ain't gonna lie, bro. I love y'all, but y'all stink.
Tell me. Y'all stink.
I promise. Dude, y'all stink. I'm not even playing, bro. You look like you stink. I just took a shower. There's no showers here though. You'll see. Stop lying. Oh my God. You're lying. Oh my God. You're lying, bro. You're lying. Stop lying. That's must. It's must. How do you smell?
Hey, lift it up.
Dude, get out of there.
Is that Old Spice?
Yes, you know. Get moved, stinky boy. Get your hands away from me.
And unsurprisingly, the first thing Vikkstar and Speed wanted to check out was the underground soccer arena.
Y'all played a game yet or no? How have you not played a game? What have you been doing for 7 days?
Blue's on a team. Chandler, Speed, Logan over here.
Yo, y'all got all the athletes. Bro, it's a stacked team.
It's even. All right, let's do it.
Come on, Speed. Come on, Speed. What's up? Go back. Dania, Dania. Here, here, punch it. Hey, keep it smart. Kick it as hard as you can. Go, hit her. Yeah! Let's go! Woo! Blue team won.
Blue skis won. Let's keep the tour going. And as we were going to check out the golf course, we caught something on camera never seen before. We caught Logan without Prime. It's so weird.
Don't put that in.
Don't put that in. After soccer, we played some golf, which honestly, Laserbeam could use some practice with. I'll give you $100 if you get a hole-in-one.
Right here? Yeah, boom. Ooh! We even climbed the massive Oh, you do some dumb stuff when you're bored, huh? If I get injured, the WWE is gonna be pissed. So will my fiancée though. I want to be a dad. What am I doing up here, dude?
We also projected a video game on the cave wall.
We're creating history right now. We're the first ones to ever play in here. Hold too big. Hold too big.
And lastly, we climbed to the very top of this cave just to play the most insane game of catch you've ever seen. The only thing stopping us from falling is this wood. It's not even stable.
Table.
Let's get in position, boys. Let's get in position. Try to catch this Feastables bar.
Here we go.
Here we go. It's a parachute. And just so you understand how high up we were, it took nearly 10 entire seconds for our Feastables bar to reach the ground. Oh, that is coming down.
Oh God.
All right, boys, dropping marshmallows.
Here they come. That's it. Oh, oh, oh, I see him. 1, 2. Oh.
Dude, it's so close. Logan, here's the Prime bottle. You got it.
You got it. You got it.
Free Prime, baby.
Let's go.
Of course, when it's Prime, he catches it. And for the last night in the city, we made a campfire in the amphitheater to wind down. All right, everybody. What was your favorite part of the video? Well, it's actually going to be leaving.
I enjoyed the friends I made.
Yeah. I enjoyed toppling the dictatorship.
Why is he the mayor? Enjoy your dictatorship. I don't know. I quit, bro. It's too much work.
My favorite part was was just dragging all these YouTubers to the middle of nowhere, deep underground, and forcing them to hang out with me. It was a lot of fun. I'm grateful for you all coming out. Thank you so much. And boys, with only one day left in this underground city, we've really started to fill this room up. All right, cut the lights off. We'll see you tomorrow for day 7.
All right, guys. Good night. Good night.
Good night, everybody.
What the— what the—
Time to go home.
Please hurry.
And after we cleaned up this entire camp, it was finally time to leave this underground city. This was fun. I'm going to miss all of you.
I just got here. Why is everyone leaving? I've been here forever.
I can't wait to leave. Our first time seeing sunlight in a week. Oh, it's so bright, dude.
Oh my God.
Now go outside and touch some grass yourself.
