Isan explorer is a private tour company which provides unique trips around NE Thailand. I joined their trip to Phimai and Ban Prasat. It was amazing, the service was professional, programs were flexible and the guide was excellent (for this trip, an american guy was the guide, so I cannot say much about the local guides). We visited a khmer temple,a huge Banyan tree, an ancient buddhist temple, a frog farm, a silk waving lady and historical digging site at Ban Prasat. The sites were interesting, and also quite different from each other, so it was not boring at all! I am sure that the other tours of the company are also great, I can recommend to anyone who wants to see the real Thailand!!