Ko Samui island of Surat Thani Province, or often, simply Samui as it is referred to by locals, is an island off the east coast of the Kra Isthmus in Thailand, close to the mainland Surat Thani town.
Samui is now the second most popular island destination in Thailand, after Phuket. Ko Samui is an oasis of natural beauty, with its white sandy beaches, dazzling coral, luscious lagoons, picturesque waterfalls, swaying coconut trees and crystal clear water. Tourism is now ahead of coconuts as the islands main industry.
(http://en.wikipedia.org/wiki/Ko_Samui)