Jules' Undersea Lodge Chalupa Research Laboratory, an undersea marine lab operated off Puerto Rico in the 1970s. The lodge features a 2 bedroom 1 bath retreat that can be rented for a night. The hotel also offers a scuba diving school. 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
Underwater habitat underwater habitat. Features include a large movie selection and specialty menus, including underwater pizza delivered by a diver. There is a cable running along the bottom of the lagoon that divers can follow at night or in reduced visibility to reach MarineLab, which is a short distance from the Jules' Undersea Lodge. MarineLab is set up to perform laboratory work and to serve as an underwater science classroom and the Jules' Undersea Lodge is used as an underwater habitat base where the participants can stay overnight, rest, relax and dine in comfort. MarineLab was used as an integral part of