Ko Samui is an island on the east coast of the Kra Isthmus in Thailand. It is Thailand's second largest island after Phuket, with an area of 228.7 km2 and a population of over 63,000 attracting 1.5 million tourists per year. Ko Samui has abundant natural resources, white sandy beaches, coral reefs and coconut trees.
If you go a bit further you can find Koh phangan, Koh Tao and koh Nang Yuai. which are as well very popular destinations