Venturing into the heart of the earth to discover the Cave of Crystals is an adventure like no other. Located in Naica, ...

Imagine a cave where the walls are covered with huge, sparkling crystals, some as big as trees. This isn’t a scene from a ...

What their lights illuminated would come to be called “The Cave of Crystals,” and it’s as deadly as it is beautiful. As the ...

Naica’s Crystals Cave, maybe the most amazing underground wonder on Earth, was discovered by chance inside the deep mine of Naica, in the State of Chihuahua, Mexico. It is a true geode: a cave ...

Floyd Collins entered Sand Cave a century ago today to explore its prospects as a visitor site and became trapped in a passageway not much wider than his chest, dislodging a 27-pound rock that pinned ...