I won't tell you how to use these images, but sifting through this massive collection may get the creative juices going. But at the very least, it's a good distraction from routine. Enjoy.
Cartophiles rejoice — the NYPL recently made over 20,000 historical maps from its database free to access, download, and use. The library's Lionel Pincus & Princess Firyal Map Division created an entire website called Map Warper where users can create an account and access all the maps, which are available courtesy of Creative Commons.
Original source found here.