Hanauma Bay
From Memory Alpha, the free Star Trek reference
Hanauma Bay is a famous bay located on the southeast coast of O'ahu, the most populated island in the Hawaiian chain on Earth.
In the 24th century, a holo-program existed called "Scuba Diving, Hanauma Bay, Earth." (TNG: "The Emissary")
This reference to scuba diving in Hanauma Bay is curious, as the bay proper is largely too shallow for all but the most basic, introductory dives. The area is instead a haven for snorkelers and snuba divers.
