Best places to visit in Khon Kaen

Khon Kaen (Thai: ขอนแก่น, pronounced [kʰɔ̌(ː)n kɛ̀n]) is one of the four major cities of Isan, Thailand, also known as the "big four of Isan", the others being Udon Thani, Nakhon Ratchasima, and Ubon Ratchathani.
It's 06:34 right now , with clear sky and the temperature of 13°C (55.4°F) in Khon Kaen.