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| 18-JAN-1979 | cave designated natural monument No. 261. |
Ondal cave is located below Ondal Castle and named after it.
On ancient maps, like Dongguk Yojiseoungram, the map of east nations, it is also
called Nam-gul (South cave) or Sansung Gul (Castle cave).
The cave is entered through a portal which is 8m high and 15m wide.
The tour includes the main branch, which is 312m long, and a side branch which
is 283m long.
Six chambers of various size contain an abundance of beautiful speleothems.
The cave contais a cave river, which lsprings from the cave and is said to be
the underground drainage of nearby Dragon's Lake (Yongso), located in the
Kagok-myon.
Karst cave.
