In the northwest is the harbor town of Nathon. There are speed boats and car rental services that bring locals and holidaymakers from the mainland of the Surathani district to the island of Koh Samui.
There are also day trips to Koh Phangan, Koh Tao or Angthong Marine Park. The island capital is not particularly pretty, but worth seeing. Here you can still find traditional Thai life, and it is worth taking a small shopping tour on Taweeraj Pakdee Road, the main street of Nathon because many goods are much cheaper than in Chaweng.