Due to preserving its nature, the park grants very limited access - a tour must be booked in advance.
Tue - Sun, tours start at 10 a.m., 11 a.m., 1 p.m., 2 p.m., 3 p.m., 4 p.m.
No admission fee.
More information on visitseoul.net http://www.visitseoul.net/en/article/article.do?_method=view&art_id=771&lang=en&m=0004003002017&p=03
Phone +82 2 472 2770
Address 1291,Cheonhodaero, Gangdong-gu, Seoul, South Korea
Coordinates 37°32'25.213" N 127°9'16.938" E