The Crystal Caves or “Cueva de Las Cristales” located below a desert area in northern Mexico about 150 miles south of the United States border. They are the most usual and most unique caves in the world. They are only found in the Naica Mine located over a fault line about 67 miles south of Chihuahua City. These caves have the world’s largest natural rock crystals.

Stalactites (from the Greek stalaktos, ‘oozing out in drips’) hang from cave ceilings. Water oozes out of cracks in the ceiling and as it evaporates it leaves behind tiny deposits of calcium carbonate. Initially these create hollow tubes. Eventually the tubes clogs up, and water runs down the outside, creating the typical stalactite shape.
Cave Location Details
Mammoth Cave System: Kentucky, USA: Longest cave system, 550 km (340 miles) of chambers & passages.
Krubera: Georgia: Deepest discovered-1710m (1mile) deep. Discovered in 2002.

You may have heard of Carlsbad Caverns National Park and the amazing cave formations that 'the big room' boasts. But did you know there are 9 backcountry caves you can also explore in the area? These caves require technical gear and technical caving experience and are well worth checking out. Numerous spectacular cave formations can be found in each of them.