14 Bluest Waters in the Whole Wide World

Con Son, Vietnam

Granite cliffs outline the crystalline water on Con Son, the only inhabited island in the barely populated 16-island archipelago of Con Dao, one of the best secret islands on Earth. Located 110 miles off Vietnam’s southeastern coast, the unspoiled island’s beaches are lined with golden sand and gorgeous blue water. For the most breathtaking views of the turquoise sea, head to the remote Dam Tre Bay lagoon.