Here's a screenshot of my latest Masterwork fortress, showing the central castle. I like the way the dormers turned out on this one, it's the first time I've tried putting them in. Yeah, that's a magma moat, it's really easy to do with the latest version of Masterwork. I'm currently working on some above ground housing and a bigger inn down there in the lower right corner. The inn is a separate L-Plan castle, sort of like Muchall's Castle:
https://en.wikipedia.org/wiki/Muchalls_Castle
It's not really that fancy compared to a lot of stuff I've seen out there but I'm playing on a pretty low horsepower system ever since my main gaming rig got stolen during my latest move. I probably shouldn't have also gone totally overboard underground like I have. I've built a 5 level grotto complex complete with powered waterfall, and my FPS is about 5-10 at this point, hehe. But flux stone has to come from someplace, am I right?