Modern Wargamers may be interested in this paper model of the familiar yellow schoolbus.
Phillip Fickling has a paper model of a submarine that may be of use for victorian science fiction fans. Click on the free model link.
This three story european paper building model looks like it would work pretty good for 15mm miniature wargames. Players of Flames of War should take a look and see if it fits in with their tabletop layouts.