North of Tampa and southwest of Gainesville, the snorkeling in the Devils Den Spring offers a unique opportunity to see a underground spring inside a dry cave. The Devils Den is a karst window, which is a collapsed opening over a subterranean river. On unusually cold mornings, fog rises from the chimney hole which caused early Florida settlers to call it the Devils Den. We first explored, there were many extinct animal fossils found from the Pleistocene Age.
Down inside the den at the water level, the surface diameter is over 100 feet with an average water depth of 50 feet. The water temperature is around 72F, so you may want to wear a wet suit for prolonged snorkeling.
The Devils Den is located in Levy County at 5390 NE 180th Avenue in Willison. It is open seven days a week from 9am to 5pm. This privately owned spring charges a nominal fee for entry and does get quite crowded in the summer where the wait can be quite long.
Overall, Devils Den Spring is the 18th most popular snorkel dive spot of all 18 snorkeling dives in Florida Gulf Coast.