Place south of Chaing Mai with clean natural swimming ?

[Mahdrek]

Hi looking for a town or city south of Chaing Mai that has lots of nature and hopefully natural clean swimming: river, waterfalls , etc

My friends family lives in Lampang and son lives in Chaing Mai, so somewhere inbetween or close to Lampang would be

We were thinking Lamphun but have no idea if has clean water to swim

Thank you in advance

[metisdead]

Please do not cross post the same topic across multiple forums, as you have also posted in Chiang Mai forum:

http://www.thaivisa.com/forum/topic/720621-quite-town-south-of-chaing-mai-with-natureswimming/#entry7721145

This one is now closed.