for more on this, check out http://www.cnngo.com/bangkok/play/gallery-heaven-and-hell-nan-087414
There was a temple near our guesthouse in Nan. Ho hum, another temple. But a squat little building caught my eye, and I wondered if something spooky lay inside. I was right. More than spooky, a collection of little figures boiling each other in oil, cutting out tongues, being impaled with spears filled the circular room. Gee, you never know what awaits you in small towns in Thailand.