For those who haven't already found it, you have to try Google Earth. It's one of the coolest little apps I've ever seen. It is a satalite imagry program based off of Google Maps, but the images and interface are amazing. So, give it a try.
Of course with every new application comes hacks, too. Be sure to check out Google Earth Hacks, you can find almost anything from Donald Trump's house to in flight cruise missiles in the middle east. You can eaisly burn hours finding anything and everything.
In case you happen to be wondering, Google Moon exists also. Be sure to zoom in all the way to discover what the moon is really made out of.