Koh Chang is one of the few remaining loactions in Thailand that has survived the mass development and tourism that others have suffered. This is surprising considering it is the Kingdom's second largest island. Koh Chang itself is the largest of 52 islands that make up the Koh Chang Marine National Park. Untouched and pristine, its natural resources and marine life make it one of the frontier dive destinations in Southeast Asia. Most of Koh Chang's dive sites are located to the south of the main island.