Hanauma Bay is a protected marine life conservation area and is one of the best places for snorkeling in Honolulu. The bay features crystal-clear water and an abundance of tropical fish, making it a must-visit for nature lovers. The beach is surrounded by lush green hills and has a large, shallow coral reef making it a great place for beginner snorkelers. Hanauma Bay is also famous for its unique geological formation, formed by a volcanic cone that is now partially submerged.