Oeosa is a temple locatit in the extreme soothren pairt o Pohang, juist inside the muntains sooth o the coastal plain formit bi the Naengcheon River. It is locatit at the fuit o Mt. Unjae (481 m) in a steep valley in Daesong-myeon. Signs placit in an aroond Oeosa claim that the temple wis foondit bi Wonhyo, the well-travelled Silla monk.