Chances are that there is a webcam close to it.
A webcam takes pictures of current conditions and posts them to the web at regular intervals. Or perhaps you want to keep track of the weather or freeway conditions. Or maybe you just like satellite pictures. There are many changing pictures that are pointed to by unchanging URLs on the Internet. Of course, you can use a web browser to view the pictures, but it's a pain to keep refreshing the picture, and it's overkill to use a big footprint web browser to view a little picture.