I really wanted to make a sleek mansion that had a fully playable interior, having spent many a gaming night in a spooky mansion.
Obviously designed by a crazy millionnaire who thought 1st impressions count, the entry hall is by far the biggest room in the house. It has a bifurcated stairway and a balcony gallery. To the back of the house is a 2 story ballroom, bedrooms and on the top floor labs (a total must for that steampunk feel!).
The front of the mansion is designed to be fixed permanently together while the floors at the back are designed to be lifted apart (once the roof is off) for easy exploration.
I've got to apologise for the 150+ files but it should be printable on relatively small printers, if you have the time, materials and the will. Also because I couldnt include directories it's going to be a jigsaw puzzle from Hell to build. Pretty sure it would be great fun for the brave though!