Udon Thani(564 kms) is famous for its world Heritage site Ban Chiang village of ancient civilization and Phu Phra Bat Historical Park with bizarre rock formations, Nakhon Phanom(740 kms) is well known for its Phrathat Phanom,which is a very ancient pagoda containing a relic of the Buddha, and its annual I11uminated Boat Procession Festival, which is held around October or November.