Koh Hong is quite a popular island for both Thai and foreign travelers. It is the location of Than Bok Khorani National Park Ranger Unit. There are two sandy beaches in the front and the back. The former is the main port, so it is not very suitable for a swim; shereas the latter is a nice diving spot around 10-30 feet deep.
In the morth is a much curved bay surrounded by Limestone Mountains so that it looks like a hall.