Web Sites With a Historical Bent Join a Place to an Image

Jon Voss went to Washington last year with a very specific plan: to pose for a photo at the Jefferson Memorial with the Washington Monument in the background.

He wanted that particular photo because his father, Joe, was photographed in that spot while living in Washington between 1948 and 1952.

The younger Voss wanted to recreate the photo right down to standing on the same block of marble.

Mr. Voss had a good reason for his meticulous recreation. Once he got the shot, he shared it with the world on historypin.com, a Web site with ambitions to create a large collection of historical photos cataloged by location and date....