Koh Phayam is situated in Ranong province, in the South of Thailand. Deep blue sky and beautiful white sandy beach can attract those who want to enjoy the quiet atmosphere. People like to mention this island as the Maldives of Thailand. Its charming is not different.
There are two interesting beaches/bays; Ao Yai and Ao Kao Kwai (Buffalo Bay). These are beautiful with white beaches. You will see amazing sunset at Ao Yai.
I can say that Koh Phayam is one of best undiscovered islands of Thailand where the beaches are not crowded. It is very peaceful island indeed.
The beaches are very wide for interesting activities; i.e. jogging, sun-bathing on soft sand, walking, etc. I think walking along the beaches would be good for your health and mind because it's relaxing.
The water is very calm so you can go swimming all day long. It is also a great place for surfing or kayaking.
If you are looking for relaxation, Koh Phayam is the right place! It would be very nice for you to take a break from your routine life or civilization to a quiet island like this.