Visit Koh Rok Islands (Rok Nok & Rok Nai)from Thailand
It has become a favorite island for anyone who has been to Koh Rok. It's actually two islands only about 200 meters apart, each with beautiful beaches and stunning diving/snorkeling spots like Seafan Garden and Bermuda Ridge - probably the best in the Andaman Sea.
Apart from a few fishing boats, palm trees and vibrant coral reefs, there's not much going on in this part of Mu Koh Lanta National Park, 30km from the mainland - and that's exactly what makes it so appealing. There is a worthwhile loop trail on Koh Rok -Nai with great viewpoints, and you can visit the ranger station and restaurant, and there are also simple overnight options on Koh Rok -Nok during the high season. Thats it. But thats so much!