These are maps full of traps like rolling boulders and spikes. There are 2 of them in the game - check out the old castle's ruins and Yorna's lair on the second (Ikko) island.
I found the trap track in the old castle ruins but I don't know where you mean by Yorna's lair on Ikko Island since it's blocked off due to being in v1.3.0.
