Special Express Train 21/22 Bangkok Aphiwat - Ubon Ratchathani, the train connecting major cities in the southern Isan region, is another Highlights train connecting the Central region and the southern Isan region that can travel between cities conveniently and quickly. Anyone interested in traveling to visit various traditional festivals in Ubon Ratchathani Province, such as the Candle Procession Festival, or stopping by to visit various cultural sites such as Wat Thung Si Mueang, Wat Phra That Nong Bua, and the Ubon Ratchathani National Museum, can easily travel by this train.