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
Carretera Central (Puerto Rico) Carretera Central (Puerto Rico) The Carretera Central is a historic north–south central highway in Puerto Rico, linking the cities of San Juan and Ponce by way of Rio Piedras, Caguas, Cayey, Aibonito, Coamo, and Juana Diaz. Plans for the road started in the first half of the 19th century, and the road was fully completed in 1898. The highway runs from the north coast city of San Juan to the south coast city of Ponce via Rio Piedras, Caguas, Cayey, Aibonito, Coamo, and Juana Diaz. The highway corridor is now signed as Puerto Rico Highway 14 from Ponce to Cayey,