MISC PHOTOS WHILE IN UDON THANI THAILAND. Udon Thani is located in the heart of the Khorat Plateau between the provinces of Khon Kaen to its south, and Nong Khai to its north. The city of Udon Thani is served by the railway line that goes northeast from Saraburi through Nakhon Ratchasima (Khorat) and Khon Kaen to the border of Laos on the outskirts of Nong Khai city.The province is most famous for the archeological site Ban Chiang with its remains of the Bronze age, located in what is now a hamlet about 85 miles east of Udon. Udon is one of the more bustling markets for agricultural goods in the relatively dry northeast of Thailand, and received its biggest economic boost in the 1960s when the US built the Udon Royal Thai Air Force Base as a joint-force military base during the Vietnam War. (the Mel Gibson film Air America refers to Udon and includes shots from the Udon military base.) Udon Thani was also the largest base in the region for CIA's anti-communism campaign.