This time, it's not so much a dimension. It's more like a single location. You find yourself in a dark, secluded place where strange noises reach your ears and the ground seems to be moving beneath your feet.
The whole area works as a riddle the player has to solve.
You have to figure out where you are, what's going on, and how to get out.
Not much text in this update, because I don't want to spoil too much.