The world in photos
I recently came across two different websites that allow you to look at the world through photos in two completely different ways.
The first site is called ChronoPhoto. It displays a photograph and you have to guess when it was taken - the closer to the correct year the more points you get. You get five photos to identify.
The second site is completely different and is called the Wonders of Street View. It is a collection of the weirdest street view images that you can click through one at a time.