The fan-shaped structure, known as 'Buchaesil,' is considered a world-class geological rarity.
These columnar joints were formed when lava cooled and contracted, resulting in five or six-sided basalt pillars.
The unique horizontal orientation of the joints in Yangnam is scientifically distinct from the predominantly vertical columns found at other famous sites like Jusangjeolli Cliff in Seogwipo.
The formation process is linked to the volcanic history of the southeastern Korean Peninsula during the Cenozoic era.
The site was designated Natural Monument No. 536 by the South Korean government in 2012.
The Yangnam Jusangjeolli is a rare geological formation consisting of unique fan-shaped, tilted, and lying columnar joints formed by volcanic activity. Unlike the vertical columns typically found in Jeju Island, these formations are oriented in multiple directions. The site features a coastal walking trail that allows visitors to observe these 20-meter-high basalt structures from various angles. The area is protected as a Natural Monument of South Korea. An observation tower is situated nearby, providing a panoramic view of the coastline and the rock formations. The geological structures were created during the Quaternary period. The site is a primary destination for those interested in volcanic geology and coastal landscape photography. The trail connects directly to the shoreline, offering proximity to the waves crashing against the basalt.
The designated observation deck overlooking the 'fan-shaped' rock cluster.
Wear comfortable walking shoes with good grip, as the coastal path can be uneven.
Bring a windbreaker even in warmer months, as the coastal breeze is consistently strong.
Use the dedicated wooden deck trails to avoid damaging the protected rock surfaces.
Do not attempt to walk off-trail onto the unprotected rocky shore, as the basalt is sharp and slippery when wet.
Do not climb on, touch, or attempt to chip away at the basalt rock formations.
