Hwanseongul Cave
A vast limestone cave in Samcheok’s protected Daei-ri cave district, with a 1.6-kilometre public circuit inside a known underground system extending about 6.2 kilometres
Limestone geology, large cave interiors, underground water features, protected cave ecology and visitors interested in one of Samcheok’s defining inland natural attractions
A mountain cave visit with a steep approach to a large entrance, followed by a 1.6-kilometre built circuit through tall limestone chambers, water features and mineral formations
The 1.6-kilometre public circuit occupies only part of Hwanseongul’s known 6.2-kilometre length. The surrounding Daei-ri cave district had already been under national protection for three decades when public visits began in 1997
Character
Most of Hwanseongul lies beyond the visitor route. Samcheok records about 6.2 kilometres of known cave, with 1.6 kilometres open to the public inside a Daei-ri cave district protected as a Natural Monument since 1966
The entrance is already large: about 14 metres wide and 10 metres high. Inside, chambers expand to roughly 20–100 metres across and 20–30 metres high. Water continues to shape the cave through streams, pools and falls, alongside stalactites, stalagmites and flowstone built by mineral-rich water moving through limestone
Samcheok lists 47 animal species found inside, including four that were first recorded from Hwanseongul or are known only from the cave
The experience
Walkways and stairs carry the 1.6-kilometre circuit through tall chambers, water features and dense limestone formations. The interior stays around 10–15°C, so in warm weather the temperature drop is immediate. The underground circuit is self-guided throughout
The cave entrance sits well above the lower visitor area. Walking the approach remains possible; the monorail has served the steep climb since 2010. Samcheok estimates about two hours for the full visit—roughly one hour for approach and return and one hour underground
History
The limestone containing Hwanseongul formed in the Paleozoic era. Over geological time, water moving through fractures dissolved the rock and enlarged underground passages, creating the cave system and its later mineral formations
Modern protection came long before mass tourism. The wider Samcheok Daei-ri Cave Area was designated Natural Monument No. 178 in 1966. The protected area covers more than 6.6 million square metres and includes several caves, among them Hwanseongul and Gwaneumgul
Hwanseongul opened to visitors on 15 October 1997, more than three decades after the cave district received national protection. The visitor circuit was laid out within the designated section of the larger cave system. The monorail began operating in April 2010, changing the surface approach; the 1.6-kilometre public underground circuit remained the same
Before you go
Cave admission and monorail use are separate purchases. The monorail covers only the steep outdoor approach; the cave ticket covers the underground circuit. Interior temperature remains about 10–15°C throughout the year
- Hours
- November–February 09:00–16:00; March–October 08:30–16:30. Last admission is 10 minutes before closing. Closed on the 18th of each month, or the following day when the 18th is a holiday
- Admission
- Cave admission: adults ₩4,500; teenagers ₩3,000; children ₩2,000. Monorail tickets are separate: adults ₩7,000 round trip or ₩4,000 one way; children ₩3,000 round trip or ₩2,000 one way
- Access
- The cave is self-guided. Samcheok estimates about two hours for the full visit: roughly one hour for the approach and return and one hour inside; the monorail serves the steep approach from the lower area