Designated Cultural Property Scenic Spot No. 17 for a magnificent coastal view, Taejongdae attracts a great number of tourists from home and abroad every year.
The site was named after King TaeJong Mu-Yeol of the Shilla Kingdom who, carried away by the stunning views, had stayed and enjoyed archery in the place.
Composed of tuffaceous sediments a.k.a. Taejongdae Formation, the Taejongdae shows off a variety of sedimentary records, geological structures and landforms of eroded or uplifted coasts.
The Taejongdae Formation is a sedimentary deposit formed in alternate layers of dark green mudstone, gray and light yellow sandstone and chert; it is classified as a tuffaceous sediment due to a high content of materials of volcanic origin in its rocks.
This indicates that, during the late Cretaceous, active volcanism occurred around the lake as the formation developed.
On the cliffs of Taejong Rock and Shinseon Rock, green, white and red-colored rocks of tuffaceous sediments paint a nature-made mural which wows visitors it looks like a piece of literati painting. Also, observed in the Taejongdae Formation are diverse geological structures such as composite dikes, chlorite veins and strike-slip faults developed into a flower structure.