Koh Samui or Samui Island is a rare gem, preserving the idyllic simplicity of a tropical hideaway. It is characterized by beaches of powdery white sand, crystal clear waters. Here you can delight in a latter-day Robinson Crusoe experience in comfort. The island, Thailand's third largest , measuring 21 kilometres at its widest point and 25 kilometres in maximum length, is one of a group of more than 80 tropical islands,only a few of which are inhabited. A mountain ridge runs east to west and most of the hinterland comprises forested hills. The rich hues of wild vegetation are dappled throughout with the contrasting greens of coconut palms and emerald paddy fields. Samui is the large of the hundreds of islands in the Gulf of Thailand, occupying a total of 250 square kilometers. Situated 400 kilometres south of Bankok, the nearest mainland town to Samui is Surat Thani 60 kms to the west. To the north lies Koh Pra Ngan island, the diving haven of Koh Tao, and the 40 breathaking islands of Ang Thong Marine Park.