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 ...

This is the only way to penetrate this "other world", to discover how nature, once again, manages to amze us with her uncomprehensible perfection. Naica’s Crystals Cave, maybe the most amazing ...

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 ...