The Hanauma Bay Nature Park, on the island of Oahu, is actually a State Underwater Park, and is an excellent --and popular-- place for snorkeling.
Hanauma Bay is often picked by "Dr. Beach" as one of "America's Best Beaches". (Read more.)
Visit the beach early, to beat the crowds. Hanauma Bay is a short drive from tourist center Waikiki Beach.
Also on Dr. Beach's lists: Hanalei Bay, Kauai, Hawaii
*photo courtesy of Florida International University
