Great Blue Hole, Belize It’s 407 feet deep and it might just have the least inspired name in the world. It rose to fame after it was named as one of the best diving locations in the world and it’s actually currently being used for research about life in the ocean.

The Big Hole, Kimberley, South Africa Said to be 3,599 feet deep (let’s say 3600 feet, no one will know), this hole is actually a big mine that wasn’t dug out by Mother Nature, but by us. We made it all by ourselves. And it’s also got a very uninspired name, which is too bad.

Glory Hole, Monticello Dam, California Look, it’s a deep hole, it’s called the “glory hole” and it sucks up 48000 cubic feet of water per second. You know where I’m going with this.

Berkeley Pit, Butte, Montana This pit used to be a copper mine and is now filled with highly acidic water. That’s how it gets that weird, dangerous-looking color. It’s about 1780 feet deep, give or take a few.

The Kola Superdeep Borehole, Russia It’s super deep, guys. It even says so in the name. This borehole is about 22000 feet deep, and it was dug for no other reason than scientific research about what would happen if they drilled a hole 22000 feet deep.

Chand Baori, Indian State of Rajasthan This amazing 100 feet deep stairwell seems like a really bad place to fall down the stairs. It’s also one of the man-made holes on this list. Well, at least I’m assuming it is, because I doubt water can erode a perfect flight of stairs – let alone a thousand times.

The Door to Hell, Derweze, Turkmenistan It’s only 98 feet deep, but it’s permanently on fire. It really does look like it’s some kind of portal into Hell, which means it’s probably safer to visit when accompanied by a priest or the guy from Doom.