Koh Chang is the second largest island of Thailand, located on the Thai east coast 310 km away from Bangkok near the border to Cambodia in the Gulf of Thailand. The name means Elephant Island. It is a mountainous island with several waterfalls and rainforest. The island is part of the Mu Koh Chang Marine National Park which consists of 47 islands, Koh Chang being the largest and best known. The park covers 192 square kilometres of land and 458 square kilometres of water, and extends to approximately 45 kilometres in length (north to south) and 32 kilometres in width (east to west). The 12. Degree line of latitude runs almost exactly horizontal through the centre of the park.