Anyway, it got me thinking about just searching online for floor plans. Its amazing the kind of stuff you can find. I searched "travel guide floor plans Venice" and found this completely random gem; if you are running Call of Cthulhu this would do nicely as a visual aid of a hotel.
Searching for "old cathedral floor plans" likewise yielded awesome results.
Searching for "Egyptian temple floor plans" yielded too many awesome results to post.
The thing that I really like about this (besides how easy it is) is that I find I get inspired quite easily just by looking at different floor plans. I already feel the inkling of an idea forming for a Cthulhu adventure using that hotel...something really, really 70s. The Egyptian granary above would make a killer jail for D&D. The image could be a player handout, a blueprint; maybe the PCs have to spring a falsely-imprisoned dignitary out of one of the central cells in order to stop an assassination.
Try it! It is almost like a Rorschach test or something; your mind will make a story out of the floor plan.
***I am still looking for submissions for 4e Forever #2!!! If you want to contribute artwork, cartography, or an article, PLEASE feel free to contact me at firstname.lastname@example.org