Just 5 hours from Bangkok is Koh Chang, Thailand's 2nd largest island.
Fly there from Trat airport and you'll be there in an hour. The beaches are pearly white and around the island there are numerous snorkeling and diving opportunities. The interior is a hilly jungle. In short, ideal for those looking for an original spot for a few days at the beach.
The Santhiya Three Resort is the perfect place to stay on the island. Sunset at Klong Prao beach included. It is built in typical Thai style with finishes in teak and rosewood and surrounded by a tropical garden that opens onto the beach.
There is a beautiful pool with Jacuzzi and the hotel's spa is pure indulgence.