Google Earth.

[Smokey]

Google Earth puts a planet's worth of imagery and other geographic information right on your desktop. View exotic locales like Maui and Paris as well as points of interest such as local restaurants, hospitals, schools, and more. And it is free

. Fly from space to your neighborhood. Type in an address and zoom right in.
. Search for schools, parks, restaurants, and hotels. Get driving directions.
. Tilt and rotate the view to see 3D terrain and buildings.
. Save and share your searches and favorites. Even add your own annotations.

[Smokey]

OOps, forgot to include the link

http://earth.google.com/