If you’re keeping score at home, the oldest functioning lavatory in Korea is an outhouse at the Buddhist temple of Bodeoksa in Yeongwol, Gangwon-do. Designated Gangwon-do Cultural Property Material No. 132, the wooden outhouse was built in 1882 and has changed little since. It is divided into male and female halves, and the waste drops down into a large room that is cleaned out by the monks regularly. Word of warning, though—bring your own toilet paper.
DO, SEE, etc: See Yeongwol Byeolmaro Observatory.
The temple is a short taxi drive from downtown Yeongwol.