Gulluoglu wrote:mvgulik wrote:refuge wrote:... openings in various places
Hold on, you mean caves can, and have in some cases, multiple entrances.
Cool. Did not know that.
Yeah, I have found several caves with at least two entrances; I read someone found one with three elsewhere on here. I don't know how high it can go, though.
I mapped this one cave (with microsoft paintbrush), 5 entrances, spreading across a few local grids:

(click for larger image)
Could you imagine the disappointment, when I realized there was no mine in that entire beast?
Even had huge rooms that were over 50 tiles wide and 200 tiles long (denoted by those large ovals) -- yeah, this image isn't to-scale, but hopefully you get my point.
Big cave is VERY big -- never saw one this big in my life, may never see one again. I wonder what the mapgen did to spit out this beast.