The wall has around 6 to 8 routes. 2 are pretty straight up and down while the rest are inverted somewhat. It's free too!!!
This wall is nestled next to Gumosan Mountain. It is not far from an outdoor entertainment park called Gumoland. From the train station simpler direct your driver to go to Gumoland or Gumosan. At Gumoland there is a four-way intersection(not a stop). This is the road you want. One way is off towards a lake and some duck boats(paddle boats) NO. This road runs perpindicular to Gumoland. Instead of going towards the lake go the other direction up the mountain road. It is only about a five to ten minute walk from Gumoland in a little park area.
It is free and seems to be in decent shape, although there are some spinners here and there.