City of Memory: Urban Story Map
City of Memory is a cool site that tags specific locations in New York City with stories that occurred there. It's an interactive map that plots out all the stories – both complex and simple on to the urban landscape. The tales span time from 40 years ago to an anecdote from the other day. Content is made up of curated examples from the site's staff and is also open to anyone who wants to contribute.
The site was created by Local Projects, who have worked on many other collaborative storytelling projects (like StoryCorps) which generate content from the audience itself, creating diverse archives of personal history.