Iceland. Photo by Christian Klepp

iceland

Lod Cave, Mae Hong Son Province, Thailand Photo by john spies

lod

Midway ice Castles, Utah

colors

Khao Luang Caves, Thailand. Photo by Craig Ferguson

thailand

Ruby Falls, Tennessee.

fontana

Na Pali Coast waterfall cave, Hawaii. Photo By topendsteve

hawaii

Cenote – Chichen-Itza, Mexico.

mexico

Mendenhall Glacier ice cave, Alaska. Photo by Kent Mearig

alaska

Krubera Cave, Abkhazia

The deepest known cave on Earth (it remains the only known cave on Earth deeper than 2,000 metres!)

china

Melissani Cave, Kefalonia, Greece

cava

Cave of ghost, Venezuela

ghost

Sierra Nevada Del Cocuy y Guican

cave

Gouffre de Padirac, France

amazing_cave

Orda cave, Russia. Photo by Viktor Lyagushkin

underwater

Rock Cave, Alabama. Photo by Jeffrey S. Rease

cave

Khao Sam Roi Yot, Thailand. Photo by Georgi IASHVILI

cave

Marble Caves, Patagonia, Chile

blue_cave

Lava Tube Cave, Tulelake, California

green_cave

Caverns of Sonora, Texas. Photo by Knowsphotos

sonora

Smoo Cave. By Klinger Photography

smoo

Ice cave Near the Mutnovsky volcano in Russia

russia

Borneo. Photo By Stuck in Customs

borneo

Algarve Cruises Seafaris, Portugal

sea_cave

Fingal’s Cave, Scotland

cave

Antelope Canyon, Arizona. Photo By Dene’ Miles

arizona

Hang En Cave, Vietnam. Photo by Carsten Peter, National Geographic

vietnam

Kangaroo Island, South Australia

austalia

Blue Ice Cave, Antarctica. Photo by Jamie Scarrow

cave

Bahamas Caves. Photo by Wes C. Skiles

bahamas

Oman. Photo by Stephen Alvarez

oman