The Cheonjiyeon Waterfall is 22 m high and 12 m wide. At the bottom of the waterfall is a plunge pool that is 20 m deep. Waterfalls are commonly formed when a river flows over a large step in the rocks that may have been formed by a fault line. A plunge pool forms at the base or behind the waterfall due to the pressure of splashback that erodes the softer layer beneath the upper hard rock. When the overhanging layers of the hard rock collapses and the softer rocks erodes, the waterfall will recede back to form a canyon or gorge downstream as it retreats upstream. This is exactly how Cheonjiyeon Waterfall was formed. A valley which is located 1 km south of the waterfall is a habitat of natural monuments such as the marbled eels (Natural Monument no. 27), Elaeocarpus sylvestris var. ellipticus (Natural Monument no. 163), and nandaerim (warm-temperate) forest (Natural Monument no. 378 and no. 379).