very cool, how did you make the stone look?

Thanks! For the stone look, I used a plastic sheet (like an impression mat) that's made for sculpting clay. I just waited til the buttercream crusted and then pressed it in all around the cake.

now thats a big castle, what pans did you use, and i love the impressions you used on the buttercream.

It's 2 10" square layers, plus I made a 8" and cut apart for the tops of the towers. It turned out bigger than I expected when I planned it in my head. It's not as huge as the picture makes it seem, but boy was it heavy. The people I made it for drove it 5 hours and I was a nervous wreck, but they sent pictures of it with the birthday boy so I know it made it ok.