The potholes are created by pebbles or sand trapped in riverbed depressions, which rotate rapidly in turbulent water to drill holes into the bedrock.
The granite bedrock at this site dates back to the Mesozoic era, showing evidence of intense water-based abrasive action.
The name 'Yeoseonam' translates to 'the rock where fairies (seon) travel (yo)', reflecting the site's mythical connection in local folklore.
The site was officially designated a South Korean Natural Monument in 2013 due to its high academic value in geomorphology.
The potholes vary significantly in size, ranging from small depressions the size of a bowl to large basins several meters wide and deep.
Yeoseonam Potholes in Mureung-ri, Yeongwol, are a natural geological formation characterized by smooth, basin-shaped cavities carved into granite bedrock by swirling water and debris over millennia. Designated as Natural Monument No. 543, these features are located along the Jucheon River, which flows through a scenic valley. The site is a prime example of fluviatile erosion, where the circular depressions are created as river stones spin in eddies during high-flow periods. The exposed white granite surface creates a distinct visual contrast against the dark, flowing river water. Unlike standard riverbanks, the rock surface is deeply sculpted with curved, undulating channels and deep, polished holes.
The elevated rock ledge overlooking the main cluster of holes near the river bend.
Wear shoes with excellent grip, as the granite surfaces are extremely smooth, uneven, and can be slippery.
Bring a polarizing filter if you are a photographer to reduce reflections on the water and better capture the deep textures inside the holes.
Stay on designated paths during or after heavy rainfall, as the river level can rise rapidly in this narrow valley.
Do not attempt to walk on the rocks if the stone surface is wet, as the polished granite provides almost no traction.
Do not climb into the deeper holes or attempt to stack rocks inside the geological formations to preserve the site's natural state.
