KAMPHAENG PHET, 77km south of Sukhothai, was probably founded in the fourteenth century by the kings of Sukhothai as a buffer city between their capital and the increasingly powerful city-state of Ayutthaya. Strategically sited 100m from the east bank of the Ping, the ruined old city has, like Sukhothai and Si Satchanalai before it, been partly restored and opened to the public as a historical park and is similarly listed as a UNESCO World Heritage Site. The least visited of the three, it rivals Si Satchanalai for your attention mainly because of the untamed setting and the gracefully weathered statues of its main temple. A new city has grown up on the southeastern boundaries of the old, the usual commercial blandness offset by a riverside park, plentiful flowers and an unusual number of historic wooden houses dotted along the main thoroughfares. You can even swim off an island in the middle of the river, accessible via a footbridge near Soi 21, a few hundred metres south of the night market. With a few days in the area, you can spend time bird-watching or rafting in the nearby national parks.