I love looking at old photographs of New York City. One of my favorite daily obsessions is the the Dirty Old 1970's New York City community page on Facebook where daily images are posted from the late 60's to the early 80's.  

Photo by Richard Greene with Gustavo Delamarques, taken from community Facebook page of Washington Street South of Chambers, 1979.

In a city that changes daily, it's amazing to look back at a moment in time and compare it to today. You can follow the photographs and nostalgia here: http://goo.gl/8PBAL5