The Combat Storm site has a couple of modern middle eastern buildings available for downloading. They’re scaled for those green plastic army men, so you may need to resize them on printing if you want to use them with smaller scales.
Here’s a page with a paper model of the Torre Del Cielo — the tower that sits outside the Pirates of the Caribbean attraction at Disneyland. If scaled properly with your printing software, it would make a really attractive addition to a wargames table.
Here’s a paper model of the mental asylum from Universal Studios’ Halloween Horror Nights attraction. It’s on the large size, so you’ll want to scale it down.
Here’s a spectacular model of a classic Victorian haunted house. I’ll work nicely for 25mm figures.
Here are some paper models of “Terrors of the Deep” — aquatic horrors to threaten your heroes.