Considering to tourism revenue, it found that Chonburi is the highest tourism potential of tourism cluster. There is Pattaya where the tourism site generates a large income to the tourism cluster and the well-known place for tourism for not less than 30 years. Apart from Pattaya, Koh Lan, Koh Krok, Koh Kood and Koh Mark that become well-known for both Thai tourists and foreign tourists, there is also man-made tourist sites. For Rayong, there is the most famous tourist site of the province, Koh Samet. For Chanthaburi, there are Chaolao Beach, Laem Sadet Beach and Ao Kungkraben that are recent well-known among tourists.