Take a look at the long and winding road down into Carlsbad Caverns National Park in New Mexico. Tourists can stick around until after sunset when a swarm of bats will flee the cave. .
Located in the Mount Arthur region of New Zealand, Nettlebed Cave is a limestone cave and one of the deepest cave systems in the Southern Hemisphere. This pool of crystals have formed 889 meters below the cave’s entrance, far from any source of natural light.