Koh Chang  is located in the southeastern region of Thailand close to the border with Cambodia. The island runs parallel to the coast and appears very mountainous from the shore due to the mountain ridge which runs the length of the island. 

          Koh Chang has many streams and rivers which are fed by the rainfall collected on the mountainous slopes of the island. Due to the great amount of rainfall here these streams are very clean and supply water all year round.

              Koh Chang islands are situated a long way away from any mainland rivers and thus the water around the islands is very clear and free from sediment. Thus the beaches are of clean white sand with crystal clear seawater and rich marine life.