The more it goes the more it becomes damp, unhealthy ... and hot! You can see water beading on the ceiling, this i the water that condenses and falls, it must be 30 degrees, it's always stuffy and this acidic odor attacks my nose, I think i will stop and go back to the surface. Slabs were placed on the ground to avoid getting bogged down in a kind of rust mud, brackish, indescribable thing, I had never seen it.