The New York Public Library recently released hundreds of thousands of digital scans from their collection into the public domain, and then turned around and built this amazing site using some vintage photographs from the collection to show streetviews of 5th avenue in 1911 side-by-side with a modern streetview.
With this public domain remix, you can compare the photos from the 1911 Fifth Avenue from Start to Finish collection with 2015’s Google Street View. Use your keyboard’s arrow keys, click on the markers on the map, or use the controls on the screen to move up and down Fifth Avenue. This website works best with Chrome or Safari.
Check out Street View, Then & Now: New York City’s Fifth Avenue to play around with the site.