Busan Yeonsandong Gobungun is a burial site from the Three Kingdoms period on a hill above the Yeonsan Tunnel near Baesan. The tombs of tribal leaders contain artifacts from both Gaya and Silla, and the old burial mounds remain in their original form. The site sits close to houses, and the walk to the top of Baesan takes about 30 to 40 minutes. It is not easily seen from the surroundings and is not well known.