This link was in my LJ Friends feed for another reason, but these photos from the NYC Municipal Archives are amazing. Kudos to The Atlantic for picking some great examples of the thousands and thousands of available images. The link to the archives itself is here.
Having lived in the New York City area for five years, and also seen it displayed and portrayed in all sorts of TV, books, movies, some of these views are striking because they show bridges being built, train wrecks, homicide photos, street vendors from long ago. This can be a source of stories, or just a source of wonder as you page through these things.
Iconic images. Pedestrian images. This is great stuff. Spend some time in old New York -- you'll be glad you did. (grin)