Google Earth is a software program which combines satellite images, road maps and Google Search into one application, allowing you to "fly" over terrain and zoom in to see the fine details.

Google Earth also allows you to download specially formatted files into Google Earth, which provide you with extra details about the area you're viewing.

For more information, visit the Google Earth User Guide: http://earth.google.com/userguide/, or download Google Earth from http://earth.google.com/.