You can’t miss the diving museum – it’s the building with the enormous mural of whale sharks on the side. The journey into the undersea covers 4000 years, with fascinating pieces like the 1797 Klingert's copper kettle, a whimsical room devoted to Jules Verne's Captain Nemo, massive deep-diving suits and an exquisite display of diving helmets from around the world. These imaginative galleries reflect the charming quirks of the Keys.
Folks in the museum can also provide information on diving in a vintage Mark V diving suit (the ones with the bulbous onion-heads connected to surface pumps). The museum stages free lectures on diving entitled (of course) 'Immerse Yourself' at 7pm on the third Wednesday of every month.