R. Mark Adams was kind enough to send over a link to Old Maps Online. The site uses an interactive interface that allows you to travel to locations around the globe and then links to a database of stunningly high resolution historical maps to browse or download. The maps are interesting in and of themselves, but also make great bits of ephemera to include with any projects tied to a specific location.
Here's a look at the area around what would become Fairfield, NY from 1776. Eventually the town would become home to Barnett College, where Professor Henry Jones Jr. would spend much of his early career. At this point in time most of the country north of the Mohawk River was unmapped and unexplored by Europeans.