Saeinbong (Mudeungsan Area National Geopark)

Saeinbong is a peak with an elevation of 488 m that shows a dome shape with vertical cliffs on its sides, and it is composed of volcanic rock called Dogok rhyolite. Along with large-scale vertical joints, numerous fracture surfaces have developed along the flow structure of the lava, and the cliffs on the sides appear to have been created by continuous collapse of the rock mass along the vertical joints. At the summit, panholes about 20 cm in diameter and 10 cm deep have formed due to repeated freezing and thawing. The name Saeinbong originates from the fact that the dome-shaped peak was said to resemble the king's royal seal, so it was called Saeinbong or Ingwaebong.

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