Kehena Beach
Kehena Beach is a narrow black sand beach located on the east shore of the island of Hawaii. Spinner dolphins frequent the water; as a result, the beach has also been known as Dolphin Beach.
The beach was formed in a 1955 lava flow. There is a point of rocks on one end of the beach that marks where the flow ended.
Kehena beach is one of the few beaches in Hawaii that allows nudity. People take advantage of this policy.
Coordinates: 19°23′42″N 154°55′45″W / 19.3949°N 154.9293°W
...
Wikipedia