If you love maps and want to loose
huge amounts of your free time, check out
Google Maps.
Satellite images of the entire world are now online, and depending on where you are the resolution can be good enough to spot the gazebo in your back yard. Like for our house, for example.
Liz and I spent a few hours locating interesting landmarks of our trip, such as the Colosseum, Eiffel Tower, our places in London, Istanbul, etc. There's cars on the road and planes at the airports.
I just keep think it's like SimCity all over again, except it's real out there somewhere. Slashdot has some
good finds to get you started.
Or how about all of the
UNESCO World Heritage Sites?