Saja and Oroejong rocks stand in the Sea Manmulsang Section of Sea Kumgang.

They are named after their shapes resembling a lion (saja in Korean) and a torpedo boat (oroejong in Korean).

The name of Anjang (saddle) Rock on the southern bank of the lower Nam River was derived from the fact that it looks like a saddle.

A legend has it that when a warrior on horseback gave his horse a sharp whipping to cross the Nam River, the saddle fell from the leaping horse and turned into a rock. It is also called An Rock.