This small program is called Google Earth.

Google recently bought up Terraservers sattelite images, overlaid them with their mapping software, and tumbled it up into the addictive program here....

Google Earth

The COOLEST feature, though, is the " Terrain tilt " feature, where you can go down to ground level and fly around, seeing the topography... Try Mount St. Helens or Mt Ranier, fly around.

Now find your house. Depending on the sat. resolution, you can see pretty intricate details.