Circular Hanauma Bay is a particularly attractive, sheltered inlet of turquoise water, carved from a submerged volcanic crater east of Diamond Head.
The sandy beach park is popular with families, with its calm waters, lifeguards, and gentle diving and snorkeling. Picnic tables overlook the bay, and you can rent diving equipment.
The area is a Nature Preserve and Marine Life Conservation District, and when you visit there’s a short film to watch about the marine life before you head down to the beach.
While diving you should spot green turtles, parrotfish and coral.