World's Largest Ice cave in Salzburg, Austria - Eisriesenwelt Cave
Marble Caves, Chile
The Crystal Cave of Giants located inside the Naica Mine in Chihuahua, Mexico was accidentally discovered in 2001 by two working miners. The vibrations are so immense, heat prevents them from studying this site further.
Crystal Caves, The Naica Mine of Chihuahua, Mexico
Psychedelic bands of sedimentary stone in a dry wash, Valley of Fire, Nevada.
Turquoise Pool, Serbia
Melissani Cave, Kefalonia, Ionian Islands, Greece
Cave by Jamshed Jurabaev
Slovenian Caves - the Grand Canyon of the underground.