OMG OMG Wow Wow

Find yourself to time to waste and head over to the New York Public Library's Digital Gallery:

NYPL Digital Gallery provides access to over 275,000 images digitized from primary sources and printed rarities in the collections of The New York Public Library, including illuminated manuscripts, historical maps, vintage posters, rare prints and photographs, illustrated books, printed ephemera, and more.

And it's all catalogued and browseable and searchable and clickable... ahh.