I originally started out with just the white castle, but thought it was really boring by itself, so I added the second castle with the volcano and the lava flow and clouds to kind of separate things a bit.
I spent a bit of time playing around with photography as well, I see what people mean about trying to take pictures of black and white castles being difficult. The pictures came out ok, although I think the black one didn't turn out as nice as I would have liked.
I enjoyed building it, but I'm finding that building mini/micro scale is more challenging than it looks. Anyway, I hope you enjoy it!

Brickshelf Folder: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=402487