There are many activities to do when you come to visit Koh Samui on your holidays. Inside Koh Samui you can do the sightseeing trip to see the temples. Such as Big Buddha Temple , Plai Laem Temple, Kunaram Temple to see the Mummified Monk (Body of Luangpor Daeng) or the other important places such as Namuang Waterfall, The Grandfather and Grandmother rock. And some inteersting places in the mountain area such as The Magic Garden or Ta Nim Waterfall. Or Teepangkorn Temple.
And the islands nearby you can do sightseeing and snorkeling or kayaking. The other islands nearby are Koh Taen (Another name is the Coral Island), Koh Phangan, Koh Tao & Koh Nangyuan and Angthong National Marine Park.