The Yucatán Peninsula in Mexico is famous for its cenotes, but few travelers know that you can swim in crystal blue water right here in Florida

Devil's Den Prehistoric Spring and Campground in Williston is an underground cave spring that stays at a cool 72 degrees year-round. I went in January and it was pretty cold — I would definitely wear a wetsuit next time!

Packed with snorkelers in the summer and scuba divers in the winter, there's no "best" time to visit, but if you arrive early enough you may have the spring to yourself 👀