National Geographic and the infinite photograph is the answer to that pesky problem of too much time on your hands. Other than the fact that it takes a while to load, it is pretty entertaining.
Check it out.
"Today, National Geographic unveils a new web 2.0 application called Infinite Photograph. In a nutshell, the app turns hundreds of online media users' photographs into infinitely clickable photo mosaics. It will eventually become an entirely new way for users to share and interact with their own and friend's photos, in a manner sites like Flickr don't yet offer."