Udon Thani is the capital of Udon Thani Province in Northeast Thailand. It is one of the “big four of Isan” alongside Nakhon Ratchasima, Ubon Ratchathani, and Khon Kaen. I visited Udon Thani as part of a railway infrastructure tour of Isaan. Udon Thani is currently served by the Northeast Line from Bangkok to Nong […]