Nawibawi Catholic Holy Site Cathedral is a Catholic church in Mangseong-myeon, Iksan. Kim Dae-geon arrived in Joseon on the night of October 12, 1845, and first set foot here. Built around 1906, the church combines traditional Korean hanok architecture with Western Gothic elements. Manggeumjeong on the hill behind the church overlooks the Geumgang River and rice fields, while the Samjonbul is difficult to see with the naked eye.