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Tranquility Bay Beach House Resort offers an idyllic blend of luxury accommodations in 2- and 3-bedroom beach houses and resort amenities in a spectacular beach setting on the Gulf of Mexico. Easy to reach, Tranquility Bay Resort is located in Marathon Florida, the heart of the Florida Keys, less than one mile from Marathon Airport, and within easy driving distance of Miami (90 minutes) and historic Key West (45 minutes). Read more about our unique Florida Keys resort features and amenities.