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
Geology of Puerto Rico Trough to the coast of Central America. Approximately 50 miles ESE of Fajardo, Puerto Rico, past the island of Vieques and approximately 20 miles south of Saint Thomas in the US Virgin Islands, can be found the Virgin Islands Trough, which in places exceeds 14,000 feet in depth. Geology of Puerto Rico Puerto Rico is composed of Jurassic to Eocene volcanic and plutonic rocks, which are overlain by younger Oligocene to recent carbonates and other sedimentary rocks. Most of the caverns and karst topography on the island occurs in the northern Oligocene to recent carbonates. The oldest rocks are approximately