Where are the Red Ribbon Army Underground Base Ruins?

Quote from Paul7889

I cant find these ruins.

I think that's an UD, you can't enter them yet.

Quote from MasterW15

I think that's an UD, you can't enter them yet.

yes, the quests for lvl 22 with no marker are the ones for UD 1 (Goldbull, taio paipai, all the quests close to the entrance,...).

That's a UD but for the record it's somewhere near Pasta Tower in Korin Forest(Where it's a D mark on the map)