Ubon Ratchathani is one of the north-eastern provinces of Thailand, and the country's easternmost. Ubon is about 600 km (370 mi) away from Bangkok. Neighboring Provinces are Sisaket, Yasothon and Amnat Charoen. To the north and east it borders Salavan and Champasak of Laos, to the south Preah Vihear of Cambodia.