This awesome software has been developed and used by NASA, but now Google just bought it for us, ordinary mortals, to freely use as well. You can go to any part of the world and "fly" over any city you want to see its geographic details with a great quality. I couldn’t believe and almost cry (hehehe) when I found my home in Brazil and all the places that I’ve spent my whole life there (click and have a look on these images that I put below). It would be cool if we really could travel around the world as easy as that... Well, maybe one day we will be able to. Meanwhile I’ll be non stop using this thing looking for all the places that I’ve already been to.
If someone wants:
http://kh.google.com/download/earth/index.htmlIt’s free and easy to use. You just need Windows XP and broadband internet.
...My father will love to use it to his classes! :)

Alto de Pinheiros - São Paulo, Brazil