The most pristine of all of the islands, Koh Thmei is part of the Ream National Park and doesn't even have an entire village to call its own, though a few families do live on the island. The only current accommodation is the eight wooden bungalows that comprise Koh Thmei Resort.
Like many Cambodian islands, the shadow of development looms large, but for now, the island remains relatively pristine. Flanked by mangrove forests, the island is a natural paradise that is as far from Sihanoukville as night is from day. Koh Thmei is the habitat of many types of interesting wildlife, particularly birds, with over 150 types of birds making their home in the park and a trip to the island offers ample bird-watching opportunities.