The best of the location is the historical park of Kamphaeng Phet. I almost prefer it to Sukhothai: the ruins of the temples in the forest with almost no visitors are a must.
To all visitors and resident: PLEASE, Keep it clean and as it is (unlike what became to Ayutthaya…).
Was the highlight of my trip. Spent 5 hours in the historical park. Never seen so many temples in my life,
this is a small town that full of historical story , people are frriendly and helpful as well as the most famous kuay kai is a kind of banana that is so sweet and unlike banana in other places.
My favorite small town in Thailand, well worth the trip up from Bangkok. The ancient temple ruins, slowly reclaimed by nature, are fascinating.
Cycling around the large complex can easily fill a day or two. The town has a nice walkway next to the river, a night market with many food vendors, and even a lively river beach (in the low season when river is not too high). People are exceptionally friendly (even by Thai standards), and helpful. Since the town is not overrun by tourists, they have none of the predatory edge like in Phuket or even Chiang Mai, quite the opposite.