Gongju City's Onnuri Citizen Pass can be obtained by online registration even if you live outside Gongju. The official guide says children under 14 may join and up to five family members can be added. It advertises 50% admission discounts at Gongsanseong Fortress, the Royal Tombs, Seokjangni Museum and the all-season sledding park. The city illustrates a KRW 12,000 admission total for four adults at the fortress reduced to KRW 6,000 with the pass. Check current eligibility, proof and overlapping-discount rules before visiting.