Jules' Undersea Lodge Jules' Undersea Lodge Jules' Undersea Lodge is an American hotel located in Key Largo, Florida and is the only underwater hotel in the United States. It is 30 feet (9 m) deep on the ocean floor and guests have to scuba dive to get to their rooms. The hotel is located at the bottom of the Emerald Lagoon and was opened in 1986. The hotel’s name comes from the novelist Jules Verne, author of "20,000 Leagues Under the Sea". Scuba certification is required for entrance as the front door is located under water. Jules’ Undersea Lodge was formerly the La
Underwater habitat of with a hatch depth of . The lagoon contains artifacts and wrecks placed there for education and training. From 1993 to 1995, NASA used MarineLab repeatedly to study Controlled Ecological Life Support Systems (CELLS). These education and research programs qualify MarineLab as the world’s most extensively used habitat. MarineLab is also used as an underwater laboratory for excursions and underwater laboratory training for recreational and sport divers who stay under the sea at the Jules' Undersea Lodge. MarineLab is currently located next to the Jules' Undersea Lodge, which is actually the La Chalupa Research Laboratory converted into a luxury