I find stuff like this fascinating. It’s a collection of slides taken by an amateur photographer during a thirty-year span from 1938 to 1969. Charles Cushman travelled around the country and the world snapping pictures. The collection was recently donated to Indiana University. It’s a firsthand perspective on the changing American landscape during the last century. I found myself looking at the pictures of places I’ve lived, like Chicago, Baltimore, and Annapolis, mentally comparing and contrasting. Great stuff! (via The Cartoonist and Metafilter)