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 21 feet (6.4 m) under water.