Google Earth!! What more can I say. This is an Amazzzing program. I used it before Google owned it (Keyhole) and have been hooked ever since. I cant stress how much I love this program. I rarely use google maps anymore. There are a ton of great features, and the list will only get better, though, I was dissapointed that google got rid of the vectored abilities that keyhole allowed.
DOWNLOAD IT, USE IT, and travel around the world within a few twitches of your finger. You'll be amazed, hooked, and looking up everything.Google Earth