The Manjanggul Cave is approximately 8 km long. Some 300 000 or 200 000 years ago, lava was flowing through this place, and formed a 13 km long system of tunnels. Only a part of the tunnel system is open to the public - some 1 km. The tour around the Manjanggul Cave takes approximately 40 minutes. The average temperature in the cave is 15 - 18°C and the humidity reaches 87 to 100 per cent. In 1962, the Manjanggul Cave was declared the national nature monument. Inside the cave you can admire interesting lava formations, dominated by a lava column which is 7-8 m high.
The Manjanggul Cave is open daily. In summer, it is open from 9 a.m. to 6 p.m. During the winter season it closes at 5 p.m. The best time for a visit is in March, April, May, August and October. Admission: 2000 won (adults) and 1000 won (children) ; reduced prices for groups and families.