Koh Chang is a national park, a group of more than 50 islands located along. The park is famous for its coral reefs, waterfalls and beaches. The largest island - Koh Chang, about 30 km long and 18 wide, is the second largest island in Thailand (after Phuket). A wide variety of corals and fish, many large and clean beaches. The island itself is covered by 60% rainforest and has an active holiday, hiking in the mountains, waterfalls, swimming in rivers and the sea.