This parasitic volcano rose from the sea about 100,000 years ago. The southeastern and northern side of the crater are cliffs, but the northwestern side is a grassy hillside that connects to Seongsanpo (Seongsan Village). The ridge is good for a nice walk or a horseback ride. Bright yellow with rapeseed flowers in the springtime, it's worth an early-morning climb to see the spectacular sunrise from the peak.