20 Out-Worldly Places On Earth That Look So Unrealistic, But They Aren't

This world is uncanny! The more you discover it, the more amazing it turns out to be. And the gems it holds within it, some of them are just so unbelievable, they look like they belong to another planet.

Naica Mine, Mexico: Naica began operations in 1794 and was taken over by Grupo Peñoles in 1952. The underground mine is serviced by a number of shafts, declines, and spiral ramps. The mine is situated on a structural dome measuring about 12 km by 7 km. Country rock is a thickly bedded Cretaceous limestone.