Via one of Tom's students comes, in all seriousness, the greatest computer application of all time. From outer space, zoom in to street level on any address in America (as well as some other select locations worldwide, like Rome, Tokyo, and Paris). Then fly over the Earth to your next desired location.

My house in NJ? It's in there.
My old apartment in Cleveland? It's in there.
My house now? It's in there.
The Washington Mall? It's in there.
The Statue of Liberty? It's in there.
My favorite restaurant in all the world, Tommy's, on Coventry Road in Cleveland Heights? Oh, it's in there.
Etc, etc.

This is seriously, unbelievably addicting. My one complaint is that the digital imagery doesn't include the relative heights of things, so you can't tilt the display to horizontal and look up at them. (I'm sure that will implemented be in Keyhole 3 or 4.)

It's a free download and you get a 7-day free trial. Get to it.