That's my fortress I built back before the days of creative mode, hand-built apart from the huge walls that were in fact done to this height with MCEdit because screw that. It's done on the outside and fully battle-ready but the inside needs a bit of work, mainly its missing commoners' quarters, a functioning kitchen and a few other commodities. Also, due to current courtyard lighting situation it is pretty much infested with badies down there. And not to forget the texture pack I'm using is not the one I had during the built so there's some strange looking corners here and there.
It still is a great bulding and I absolutely love it.
http://farm9.staticflickr.com/8005/7409482398_8b4fac4134_c.jpg
http://farm9.staticflickr.com/8022/7409548480_1f40d18011_c.jpg
http://farm6.staticflickr.com/5034/7409552948_fff05b403e_c.jpg
http://farm9.staticflickr.com/8017/7409550696_a641d1914e_c.jpg
Only a rough look on the outside since I can't fly and it's partly so big and complicated inside that I nearly got lost just now trying to reach one of the outer wall balconies.
Now if only I still had that huge underwater city with cathedral, shopping center, two-story bio dome and railway line somewhere in my files... and if my dwarven city wasn't so gigantic that it would only render sky instead of stone walls...