Trunk Bay, St John, US Virgin Islands

Trunk Bay features the world's first underwater snorkeling trail, a 225-meter submerged gallery established by the National Park Service that identifies coral and fish species and attracts over 100,000 visitors annually. The sheltered cove offers powdery white sand and a tropical forest backdrop, earning a spot on National Geographic's list of the world's ten most beautiful beaches. With water clarity averaging 18 meters, it outperforms #7 Pigeon Point Beach by maintaining clearer conditions during seasonal plankton blooms, making it a superior choice for underwater exploration.