Dolomite caves locate at Ban Nang Kam, Donsak district, Surat thani province. Dolomite caves are coastal cave. The caves have various sizes with average width of 5 meters average height of 1.5 meters average depth of 3 meters, located along the rocky shoreline, caused by the erosion of rain and the sea water. During high tide dolomite cracks in the style of the elephant skin can be corroded very well by sea water. Once upon a time, many millions of years, resulting As caves, seen in nowadays.