At the Devil’s Spring system in Florida, crystal-clear water pours out of an underwater cave and into the Santa Fe River. From the surface, the entrance looks calm. But once divers descend inside, ...

Jackson Blue Spring in northern Florida is one of the most famous cave diving sites in the world. Every day millions of gallons of groundwater surge out of the spring from an enormous cave system ...

Cave diving combines the thrill of scuba diving and with the excitement of exploring a cave; it’s a challenging activity even for experienced explorers. At these four sites — some of the most popular ...