I love the website called Shorpy, which is a "a vintage photo blog featuring thousands of high-definition images from the 1850s to 1950s. The site is named after Shorpy Higginbotham, a teenage coal miner who lived 100 years ago." Be sure to read about Shorpy while you're there. You can click on the "View Full Size" link under every photo to see a super-sized version. And don't blame me if you end up spending way too much time there, like I do!