In 2014 I was in Khorat and we did visit the Wat Luang Pho To. Well to call it a temple goes a bit far. I think it is more a theme-park and the theme is a temple where people go for good-luck to win the lottery. But it is a great place to visit with a nice Japanese style garden with fountain, a small lake, food court, coffee shop and ... a temple in very modern design. At 5 December (the birthday of the King of Thailand and fathers-day) it was very busy. You will need your own transport to get here. It is a few km east of Sikhio city (and that is already totally of the tourist map). But once with your own transport it is easy as it is right along the highway to Khorat.