Koh Tan Island is located approximately five kilometres south of Koh Samui in the Gulf of Thailand. The island has various colorful, hard, and soft corals and is a popular destination for snorkeling, kayaking, and scuba diving. It is only accessible by a boat (long tail boat or speedboat).
The island is a vast spread of 7.5 square kilometres white sandy beaches offering a serene ambience and tonnes of natural beauty above and below the water. Koh Tan Island is a calm and silent place without motorbikes or cars or proper roads. There is also a small fishing village which has a short trek, mangrove forest and a good population of monitor lizards.