Located some hundreds kilometre east of Bangkok, Koh Si Chang is the most well known and biggest island in Chonburi Province. The island has been in a tourist map since the early 20th century. Covering an area of 18 square kilometers, it is surrounded by small islets; namely Koh Kham Yai, Koh Kham Noi, Koh Prong, Koh Ran Dokmai, Koh Sampan Yeu, Koh Kang Kao, Koh Yai Tao, and Koh Tai Ta Meun.
The geography of the island consists mostly of hills and a few small beaches. There is no resource of fresh water on the island. Thus, the locals have water transported by boat from the shore. The highest point of Koh Si Chang is on a hill north of the island, approximately 192 metres above sea level. It undoubtedly offers the best outlook of the island.
The island welcomes more tourists during weekend as passenger boats from Charin pier in Sriracha District disembarks at Tewawong pier (or Tha Lang). From this pier, ones could get to other parts of the island by local taxi.
Despite a large number of tourist arrivals, the main source of income of islanders comes from fishery. Therefore, we can see simple and traditional lifestyles of islanders here. The most important attractions on the islands are old European style buildings that are remnants from the early 20th century when King Rama V took refuge here during summer. Nowadays, there are a few small hotels on the island.
