Ansan Hwangtotgil is a 450-meter barefoot yellow-clay walking path on Ansan in Yeonhui-dong, Seodaemun-gu, Seoul. Walkers go barefoot on the damp clay, and foot-washing stations and shoe storage areas appear along the route. A vinyl greenhouse tunnel covers the entire path so it can be used in rain and snow, and a yellow-clay pool has been added. The path is 2 meters wide, which is narrow when several people walk together.