I'm such a geek for Google Maps. I leaf through my old address books looking for names of people I know in far away places and then zoom in on their houses from space using the satellite photo feature. Very voyeuristic, I just wish you could get even closer!
Someone did a very cool VR movie of downtown Vancouver a few years ago where you could click on any intersection and pan all around to check it out. It was fun going to my intersection and try to zoom in the windows of my house, or trying to guess when it was made based on what shops were out of business!