Blue Grotto & Devil’s Den Combo Dive

Blue Grotto & Devil’s Den Combo Dive

Depth & Duration 

Maximum depth of 100 feet, all open water dives. Approximately 6 hours departing at 10 AM.

About This Experience

Located in Williston, Florida, Blue Grotto is a cavern system great for open water divers. One of the more unique aspects of Blue Grotto is their fresh air filled “bell” located at 60 feet. This air bell is constantly being supplied by a compressor, so you don’t have to worry about CO2 retention and it can even fit several divers at once.

While in the bell, you can take out your regulator and look through the glass at the people swimming above you. You can explore the open cavern system without needing any more than open water certification, although it is recommended that you limit yourself to a 60 foot maximum depth if this is the case. Past this point it can become silty and quite dark and more experience is required. 

Above ground, there is a large area for picnics and outdoor sports so that you can enjoy time in and out of the water. The water is a constant 72 degrees year round. In addition, the park has hot showers and changing areas.

Another incredible location included on this tour is Devil’s Den. Known for its underground spring inside a dry cave in Williston, Florida, it includes the remains of many extinct animals from the Pleistocene Age (2 million – 10,000 years ago). These were discovered at Devil’s Den, including the bones of early man, dating back to 75,000 B.C! The year-round spring temperature is 72 degrees making for a comfortable dive location. On cold winter mornings you can see steam rising from the hole in the top of the dome. The early settlers called the place Devil’s Den because of the smoke-like appearance caused by the steam. This is a good site for open water divers who wish to experience cavern diving and swim in an underground lake. The bonus of fossils and remains from millions of years ago makes this dive a must-do for any diver seeking to explore all Florida has to offer!


  • Two locations, one dive at each site:
    • $275 for a single diver
    • $175 per person for multiple divers
  • Or choose two dives at a  single dive site:
    • $250 for a single diver
    • $150 per person for multiple divers
  • Includes entrance fees to the parks, along with a dive guide and complimentary gear
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