The Myonggan Monolith is standing in the middle of a plain in Myonggan County, North Hamgyong Province of Korea.
It was formed with basalt eroded by river to have only crater remaining. The monolith has clear and close cleat in the shape of hexagonal pillar and is hard and greyish green. It is 103 metres above the sea level and its relative height is about 50 metres.
The circumference is comparatively round and the eastern side is sheer and the northern and western sides are inclined. Tall trees and shrubs are growing on the cliff and slopes. The Myonggan Monolith is a natural monument which is of significance in studying the volcanic activity and the change and evolution of the crust and adds beauty to the area.