The Cave of the Crystals in Chihuahua, Mexico has a selenite crystals that are an average tree size. The cave is extremely hot and its air temperatures reaching up to 136 °F. Therefore, people can only endure approximately ten minutes of exposure, without proper protection.
In the Kantemo Caves, Mexico, snakes hang down from the cave ceiling to catch and eat bats.
For years, scientists didn’t know what caused mysterious cave networks in South America. In 2010, they learned that the caves were actually tunnels dug by ancient giant sloths.
In India there are 29 caves joined together which are filled with paintings from over 3 religions (Hinduism, Buddhism and Jainism), which were constructed in 520 BCE and has a size of 8,242 ha, making it one of the largest man-made cave structures ever built.
Cave systems were recently discovered beneath Antarctica which are warm enough to wear t-shirts in, and in which it is said a “lost world” of new animals and plants may exist.
Romanian sewer workers accidentally discovered a cave which was sealed for 5.5 million years. Movile Cave is filled with evolutionary distinct exotic creatures (albino crabs, worms) which feed off sulfur-producing bacteria.
A one of a kind sulfur based ecosystem exists in a Romanian cave completely sealed off from the rest of the world.