It's an American diver's dream come true. From Oahu and the Big Island to Maui, Kauai and Molokai, here are a group of exquisite, beautifully lush islands that you don't need a passport to travel to. But when compared to other, more distant Pacific pearls, Hawaii diving is sometimes overlooked and often underrated.With its location 2,500 miles from the nearest continental landmass, Hawaii is one of the planet's most remote archipelagos. The islands' isolation from the rest of the world means encounters with endemic species.