Gongsanseong Fortress is at 280 Ungjin-ro, Gongju, Chungnam, and is a historic Baekje royal fortress. KTO venue details revised in July 2026 list opening hours of 09:00–18:00 from March to October and 09:00–17:00 from November to February, with last admission 30 minutes before closing. There are two accessible parking spaces at the ticket-office lot and one at the visitor-center lot, but the latter is usually closed and requires advance contact. Wheelchair users can follow certain routes from Geumseoru toward Gongbukru and Ssangsujeong, whereas other routes are difficult or inaccessible because of dirt and steep slopes. Accessible toilets are listed beside the information center below Geumseoru. Confirm specific entry and parking availability before the trip.