The last weekend of 2012, we spent at Kamphaeng Phet, a place worth visiting although it is quite far from Bkk (some 350+ kms). For more details and pictures, please see the Traveller's group:
http://www.thailandfriends.com/group...188&do=discuss for Kamphaeng Phet and general information
http://www.thailandfriends.com/group.php?discussionid=189&do=discuss for the Historical Park
http://www.thailandfriends.com/group...191&do=discuss for the Waterfalls and
http://www.thailandfriends.com/group.php?discussionid=190&do=discuss for the Hot springs