History is a great way to get in touch with your surroundings, find out where you came from, and learn the past trials and tribulations of your hometown. Historypin is a great new app that aims to help you with these things by way of photograph. Using geolocation, it allows you to browse through thousands of images and stories relevant to where you're at in the world, as well as overlay the classic image on a modern backdrop in augmented reality fashion.
You can also include your own piece of history by uploading your own photos, or digitizing an old photo directly from within the app.
According the Market listing if you "shake it, shake it, shake it like a Polaroid picture," you can also access random historical photos from all over the globe.
Historypin is free in the Android Market - grab it by hitting the widget below.