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 the "Scott Carpenter, Man in the Sea" Program. In the early 1970s, Ian Koblick, president of Marine Resources Development Foundation, developed and operated the La Chalupa research laboratory, which was the largest and most technologically advanced underwater habitat of its time. Koblick, who has continued his work as a pioneer in developing advanced undersea programs for ocean science and education, is the co-author of the book "Living and Working in the Sea" and is considered one of the foremost authorities on undersea habitation. La Chalupa was operated off Puerto Rico. During the habitat's launching for its second mission, a steel