Best Hotels on and Under the Water - Slideshow

Jules' Undersea Lodge, Key Largo, Fla.

Jules' origins date back to the early 1970s. Jules' was formerly a research laboratory base in Puerto Rico, and its only guests were "aquanauts" (divers who stay underwater for over 24 hours). In the 1980s, the complex was refashioned into an original sub-aquatic lodge set in Key Largo, Fla. 

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