Vibrations
Another fascinating thing about caves is its capability to survive extreme environments. For instance, bats and the Olms salamander use echolocation and electro-sensation to feel around their surroundings in finding their way around. These aren’t the only species who do this, but this also goes for rare fish species who no longer use their eyes anymore. These fish live in their cave pools and find it easier to move around using vibrations, otherwise known as a lateral line that hits the fish’s vertebrae.
Crystal Cave
We’ve mentioned several crystals in caves in this list as they continue to be such a fascinating thing. There’s one variety of crystals that are so long, they’re capable of rivaling the telephone poles we see today. These long crystals can be found in the Cave of Crystals in Mexico and are capable of growing up to 36 feet and weighing as heavy as 55 tons. However, an average person can’t venture through this cave as it can reach as high as 118 degrees Fahrenheit.