Here are some photos of the Wizard's Tower I've almost completed (a door would be helpful!).
It began life as the tube around a bottle of Scotch. It is cut into sections in jigsaw-puzzle form, so that the stories come apart. They have rooms - of the simplest kind - with floors and trapdoor holes - in each section. The jigsaw form permits it to hold together better than simply cutting straight lines.
I'd like to keep it, but I'll entertain offers! Ain't it always that way?