The cave contains 12 distinct underground ponds that fluctuate in water level based on the nearby Wangpicheon Stream.
Archaeological excavations inside the cave have uncovered artifacts dating back to the Silla Dynasty.
It is estimated to be approximately 250 million years old.
Local records indicate the cave provided sanctuary for over 500 people during the Imjin War.
The cave system includes a 'frozen' stalactite formation that resembles a waterfall turned to stone.
Scientific surveys have identified rare, cave-adapted troglobite species living within the deepest chambers.
Seongnyugul Cave is a limestone karst cave located in Uljin, Gyeongsangbuk-do, known for its extensive network of stalactites and stalagmites. The cave system spans approximately 470 meters in length, though only a portion is accessible to the public via a managed walkway. It features twelve underground ponds, including the deep, clear waters of the main lake. The cave is historically significant, having served as a refuge for local residents during the Japanese invasions of Korea in the late 16th century. Geologically, it is noted for its diverse dripstone formations and subterranean ecosystem. The name Seongnyugul translates to 'Cave of the Immortals,' referencing local folklore. It is situated near the Wangpicheon Stream, which significantly influences the cave's internal water levels and humidity. The interior maintains a consistent year-round temperature, providing a stable microclimate for cave-dwelling organisms.
The main cavern bridge offering a wide-angle view of the illuminated lake and the reflection of the surrounding limestone formations.
Wear a light jacket as the internal temperature remains cool even during summer months.
Bring a pair of non-slip shoes with good grip for the metal stairs and humid walkways.
The interior contains low-hanging rock formations; watch your head in narrow passages.
Attempting to stray from the marked steel walkways or ignoring the provided safety helmet requirements.
Closed during extreme weather events, such as heavy flooding of the Wangpicheon Stream, which can submerge parts of the entrance.
Safety helmets are mandatory and provided at the entrance; touching the stalactites is strictly prohibited to protect the cave's delicate ecosystem.
