Be sure to bring your camera to capture the spectacular cascades of Hin Lad Waterfall. If it's raging, you may be able to feel the mist on your skin.
You'll have no end of sightseeing choices when staying in Koh Samui. Hin Lad Waterfall is an ideal place to kick off here, but there are loads of other interesting attractions to discover. Namuang Waterfall 1, Hin Laad Waterfall, and Namuang Waterfall 2 are close to the cascade of water and will fill in your day nicely.