3d css level design problem



In the above site, I adjusted the map to look like it's on a 3d plane, my question is, the blue tiles are a separate map from the first one, but I want basically stone blocks to sit on them. I'm trying to get that one specific div to stand straight up, or look like it's standing straight up, from that point I will create another wall on the right side and the top. so it will be the 3d stone. I've tried to do this with everything that I know but can't. I've used skew to make it look like it but the problem is the tiles to the left and right look all wacked out because of the css I am using.

FYI: I know that there is a bunch of code in there right now that's not being used, I did that on purpose because I only wanted u to see what I wanted with the basic stuff.