There are over 70,000 known caves worldwide, with many more waiting to be discovered. The longest cave system in the world, the Mammoth Cave system in Kentucky, spans over 643 miles.
Caves have been a source of fascination for humans for centuries, serving as shelters, spiritual sites, and even homes for unique ecosystems. From the towering stalactites of Carlsbad Caverns to the glittering crystals of Naica Mine, each cave is a natural wonder that invites exploration and discovery.