Together with my students I went to Boryeong Mud Festival in July, 2015. It only takes about an hour to get from our Academy to Daecheon Beach in Boryeong of Chungcheongnam-do. I enjoyed it very much!
I wish I could had been there again in July of 2016, but I was busy. The students went together with a guide and were happy to watch Psy concert right on the beach.