I wish I was
The Map-a-Week archive gives you a listing of eight years of maps! By my quick GM math that means if you were to print these out and try to carry them around you would be encumbered according to most RPG rulesets.
The most difficult thing you'll have to deal with is simply sorting all these maps into some workable system. You might not use all of the maps, but I'm certain that any enterprising GM can get some use out of this great resource.