Vadim Makhorov and Vitaliy Raskalov are the two halves of On The Roofs.
They have a YouTube channel full of absolutely insane climbing videos. In their newest video they sneak into Shanghai Tower.
Look at this dude just chilling.
Shanghai Tower is the second tallest building in the world.
When it's completed this year it will stand at 2,073 feet high.
Vadim and Vitaliy, though, didn't wait for construction to be over and got in with a go pro camera.
The two of them got to the top of the building.
And then kept going.
Then they took a breather and hung out on this piece of scaffolding.
And then kept climbing.
Until they were literally standing on the highest point on the second largest tower in the world.
Which, when you look down, looks like this.
If you've got the stomach for it, here is Vadim and Vitaliy's full video.
Ryan Broderick is a reporter for BuzzFeed News and is based in London.
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