Visiting Shorpy is like stumbling onto an old, dusty photo album in the attic. Except instead of finding portraits of Grandma and Grandpa, you'll see cool photos from around the world ("Always something interesting," as the blog describes itself). Each image is available in high resolution, making them perfect to print. There are more than 1,000 photos on the blog, and fans can pitch their own dusty favorites, adding to the collection.