From Seongsan (Ilchulbong) you can take the Ilju Road East Direction (Road No. 1132) but going in the west direction (the Ilju Road West Direction goes West from Terminal). It will take 40 minutes and cost 1,000 won. A few buses go by the Seongsan Office stop so make sure to ask the bus driver if the bus goes to Man-jang-gul. If you’re going from Terminal, get on the same bus but it will take 50 minutes and cost 2,000 won.

From the bus stop you can walk 2.5 kilometers or take a taxi. We walked there and took the taxi back and the walk was quite nice. There was no sidewalk for more than half of it. Just before the caves there is a maze (500 meters before the cave).

You need to pay 2,000 won to go into the cave and it is 1,000 meters long (well, 1,000 meters that you can access). The second you walk down you will feel a change in the temperature and humidity which was a VERY welcome break. There is a sign saying to not speak loudly, take photos, or take creatures out of the cave. Since it’s Korea you can’t expect people to not be loud–it’s not the subway–and I assume they meant no flash. I, sadly, saw no creatures to steal. This was specified by a later sign with pictures of bats but I still didn’t see them.

There were a lot of informational signs inside, however many people seemed to just blow past them to get to the end. None were very extensive and I found them interesting.

Some overview: Manjanggul cave is a 7.4 km-long lava tube locally with a multi-level structure. It is one of the largest lava tubes in the world having a main passage with a width of up to 18 meters and a height of up to 23 meters. Numerous lava tubes are found worldwide, but Manjanggul Lava Tube is an outstanding example because it has well-preserved passage shapes and internal micro-topographic features in spite of its very old age. Thus the cave possesses significant scientific and conservation values. Three entrances to the cave developed due to a collapse of the ceiling, with the Second Entrance being the one used by tourists. A variety of lava formations and decorations, such as lava stalactites, lava stalagmites, flow lines, lava benches and lava rafts are present. The 7.6 meter high lava column is known to be the largest lava column in the world.

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Lava flow lines: When lava flows in a tube, the level of the flow is often recorded on the walls. These features are called lava flow lines. Numerous flow lines are found in Manjanggul Lava Tube, indicating that the level of lava flows was falling continuously inside the active tube.

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Rock falls: Abundant rock fragments that fell from the ceiling are found on the floor of lava tubes. They fall from the ceiling either during or after the lava-tube formation. The fallen rocks rest on the floor of lava tubes when the lava stopped to flow and is solidified. Otherwise, fallen rocks are either carried away down stream by active lava flows or melted down.

Lava Raft: A lava raft is formed when rock fragments from the ceiling or sidewall fall during lava flow and then are carried away by lava before settling and solidifying at a certain location. In some cases, fallen rocks are completely coated by lava to form mound-like or ball-like lava rafts, which are called lava balls. The one photoed here is called Turtle Raft and resembles Jeju Island and is a symbol of Manjanggul Lava Tube.

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Quartzite fragments: Most rockfall debris in Manjanggul consists of basaltic rocks but also comprises light-colored rocks, called quartzite, that are distinguished from basalt. These rock fragments, ranging between 1 and 5 centimeters in size, are interpreted to have been derived from the metamorphic basement rocks and then incorporated into the lava flow.

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Lava shelves: Lava shelves form when the liquid lava, only partially filling the tube, is accreted and hardened on the cooler walls. Lava shelves are further divided into lava balconies and lava benches by their shapes. (I feel like the people naming things just got lazy here and looked outside).

Lava toe: Lava toes formed when the lava flowing though the upper-level tube poured down though a  floor opening into the lava tube below. The poured-down lava flowed in a series of elongated and entangled lava lobes, each of which is reminiscent of an elephant toe, giving it its name. (I don’t see it)

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Lava flow stones: Lava flow stones form as the heat of lava melts the ceiling and walls inside a lava tube. The melted lava flows down the walls and take on varying sizes and shapes depending on the temperature and amount of lava. The lava flow stones also form when liquid lava inside the wall seeps out though small holes.

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Lava Column: A lava column forms when lava pours down from the ceiling to the floor and congeals. Lava columns are found in many lava tubes elsewhere around the world. However, the 7.6 meter-high lava column in Manjanggul Lava Tube is the largest lava gest known. The lava poured down from the ceiling spread across the floor of the lower passage and made well-developed lava toes.

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Here’s some photos I just likedJeju 272 Jeju 293 Jeju 301 Jeju 307

Outside, there is a Lava Column Cascade which is a fancy name for a cascade, like above, that has been turned into a water fountain. There is also a convenience store, bathrooms, water fountains and a restaurant.

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