1. Hanauma Bay Nature Preserve, Oahu, Hawaii

HANAUMA BAY NATURE RESERVE

This idyllic, crescent-shaped coral sand beach that has formed in this ocean-breached volcano is stunning in every respect. Hanauma Bay provides the best snorkeling in Hawaii in safe, calm water. Thousands of tropical fish await your visit in shallow water and close to shore. Come early as the parking lot fills up quickly.