Some of the coolest places on the planet happen to be covered in water, but trust us: they are well worth the dive. Here are 16 of the best underwater sites around the world, including museums, hotels, shipwrecks, and even a fully functioning post office.
The world's most jaw-dropping underwater attractions
10 Deep water - nature ideas underwater, underwater caves, underwater photography
Travel Ideas & Inspiration, Page 225
Grüner See (Green Lake)
8 amazing underwater attractions
16 Incredible Underwater Places Around the World
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13 Places With the Clearest Water in the World
Sistema Dos Ojos Cenotes
Sweepstakes Schooner