30 minutes off the coast of Cancún, Cancún,

Sharks have to constantly stay in motion to breath through their skins, according to scientists. But there’s at least one place where these amazing creatures cool their wheels-the Cave of the Sleeping Sharks. The sharks use bubbles from underwater springs to breath, letting them relax for a while. There are not as many sharks nowadays because of heavy diver activity, but you can still catch one or two snoozing every once in while.