Gongju City's Seokjangni Museum publishes a combined ticket for Seokjangni Museum, Gongsanseong Fortress, and the Royal Tombs including King Muryeong's Tomb. Prices are KRW 6,000 for adults, 4,000 for teenagers and 2,000 for children. It is valid through the day after the first use, with no partial refunds for skipped stops. Separate museum admission (such as Seokjangni's KRW 3,000 adult ticket) and any citizen-card discounts follow different conditions. Check the three sites' opening hours before planning a two-day itinerary.