This is a link to an incredible story.
Vivian Maier took amazing photographs in and around the streets of New York & Chicago. She was a care worker and nanny who kept her passtime a secret.
The story is best told by the website and not by me though. As with all photography, look deep into the images and take it all in. As you run through the archives, you'll click back once every so often because you'll realise you've missed detail in the background.
This is real life New York & Chicago in the latter part of the 20th century through the eyes and lens of a phototgraphic genius.