The Cave of Swords (Cueva de las Espadas) and the Cave of the Crystals (Cueva de los Cristales) in the Naica Hills, Chihuahua, Mexico are named after the extraordinary gypsum crystals that have formed there.
It is only recently that the mystery of how the caves formed has been solved. For more pictures and information check out the 2007 calendar (1.5Mb 
) or visit the Giant Crystal Project.
One thought on “The Cave of Swords”