Formed by massive limestone rocks rising from the Andaman Sea, Koh Bida Nok and Koh Bida Nai are the southernmost areas of the Phi Phi Islands. These twin jewels feature Phi Phi’s most exhilarating snorkeling, sea diving, and shark-watching tours, only next to Ao Nang. With over 28 meters of excellent underwater visibility, they are home to towering dive sites, colorful reefs, harmless black-tip sharks, turtles, and stingrays.