Situated about 30 minutes speedboat ride from Laem Ngop Pier on the mainland, Koh Wai is a tiny island of 2 to 3 kilometres long by the same again wide.
Despite having no villages, shops, local houses, roads, vehicles or mains electricity, there are five places to stay, a mixture of backpacker style thatch huts and simple resort-style bungalows.
A handful of lovely small beaches line its north shores, with a simple coastal path connecting them together, a walk of no more than 30 minutes. The interior and other coasts are untouched forest.
Not surprisingly, given its location, shallow waters and white sands, Koh Wai is immensely popular with snorkeling boat trips coming out from Koh Chang and it does get crowded at certain times of day. Heading further south, Koh Mak is 30 minutes away by speedboat and Koh Kood 90 minutes.