Undersea Lodge Jules' Florida, USA Undoubtedly most people have never been to a hotel like Jules Undersea Lodge before. This extremely unusual hotel, located in Key Largo, Florida,is on the ocean floor! Guests scuba dive to the hotels one unit, which is over 19 feet (six meters below the surface. The unit includes two bedrooms, a television, and 50-inch (107 centimeter) circular windows that offer views of passing sea life.