Dr. Beach's #1 pick for America's Top Beach, 2004:

Hanauma Bay, Oahu, Hawaii

This perfect crescent, like a paper punch out of the island's shoreline, is the remains of an ancient volcano. Preserved by Hawaiian royalty, the beautiful beach today is enjoyed by visitors, locals, and marine life alike; don't be surprised to spot sea turtles as the two of you snorkel these beautiful waters.