#9 Punalu’u Beach on the Big Island of Hawaii
Black as the ace of spades, this beach looks more like a tarmac or asphalt parking lot than a seaside location for paddling or swimming. The cause of the weird black sand is a volcano that resulted in lava flowing downhill into the ocean. Also known as Black Sand Beach, Punalu’u is a very rocky area, and it isn’t safe for swimming. The water is very cold and doesn’t look too inviting, largely because of its color. Nevertheless, it is home to endangered green turtles and hawksbills, and other marine creatures.