Devil's Den Spring is a privately owned scuba diving training center and premier prehistoric spring destination in Williston, Florida, featuring an underground spring within a 120-foot wide cave with constant 72-degree water temperature year-round. It offers scuba diving for certified divers, snorkeling by reservation, camping (tent, RV, cabins), and exploration of ancient fossils and rock formations dating back to the Pleistocene Age.

Blue Grotto Dive Resort is Florida’s favorite freshwater dive site, featuring a spring-fed sinkhole with three distinct areas: a large open-water basin to 40 feet ideal for training, an upper cavern to 50 feet with an air bell and artifacts, and a lower chamber requiring cave diver training. The resort offers dive center services including rentals (BCs, regulators, tanks, wetsuits, masks, fins), air fills, snacks, souvenirs, heated bathhouse, pavilions, cabins, cottages, camping, classroom, and training pool. It caters to divers of all levels with on-site instructors for courses from Discover Scuba to instructor-level, and features wildlife like Virgil the turtle.