Immigration Services Offered in Ubon town. Posted on April 23, 2015 Written by Darwin 3 Comments. On Friday, April 24th, 2015, Ubon Ratchathani Immigration Office will be at Anuban School, beside Tung Sri Muang Park, in downtown Ubon. … relatively near Thung Si Mueang Park? I will likely be staying somewhere close to the festivities, or within a 1-2km walk (I don't mind walking – in fact, I love exploring new towns that way). Thanks, Rael Huai Khwang, Bangkok. tage says:.