Best places to visit in Udon Thani

Udon Thani (Thai: อุดรธานี, pronounced [ʔù.dɔ̄ːn tʰāː.nīː]) is one of the four major cities (Khorat, Ubon Ratchathani, Udon Thani, and Khon Kaen) of the Isan region, Thailand, (known as the "big four of Isan").
It's 07:47 right now , with mist and the temperature of 10°C (50°F) in Udon Thani.