Google Mars
You just have to love Google. Click above to link to Google Mars. The maps are going to only get better now that the latest U.S. craft orbiting Mars, the Mars Reconnaissance Orbiter. This is a picture taken shortly after the craft entered into it's final orbit after months of aerobraking. The picture above is the Valles Marineris. This is the Grand Canyon of Mars, at time miles deep and stretching thousands of miles long.
