Free GM Resource: Hipkiss' Scanned Old Maps
This week's Free GM Resource is a cartophile's private collection of scanned maps called Hipkiss' Scanned Old Maps. The maps should all be public domain maps and I'm sure a lot of them may prove worthless for the average GM, but when you do find a good map it is like striking gold.
Personally I love finding an old map that presents some useful information in an unusual way. There is just something about the artistry involved that I find inspiring. Hopefully you'll find something inspiring as well.