Sakon Nakhon (647km) offers tourists the picturesque scenery of the vast Nong Han Lake and Phu Phan National Park. Surin (457km), the land of elephants, is world famous for its Elephant Round-up taking place at the third weekend of November. Si Sa Ket (571km) where the famous Khmer ruins, Khao Phra Wihan, is located on the Cambodian border. There are many other Khmer-style stone buildings in the province which are worth visiting. Buri Ram (410km) comprising plenty of Khmer ruins, this province is which the largest Khmer-style stone temple, Prasat Hin Phanom Rung is located. Loei (520km), a challenging place for nature lovers who want to admire the scenic beauty of Phu Kradueng National Park in the cool season.Udon Thani (564km) 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 (740km) is well known for its Phrathat Phanom, which is a very ancient pagoda containing a relic of the Buddha, and its annual Illuminated Boat Procession Festival, which is held around October or November.