from the site:
Google Earth – Explore, Search and Discover

Want to know more about a specific location? Dive right in -- Google Earth combines satellite imagery, maps and the power of Google Search to put the world's geographic information at your fingertips.
http://earth.google.com/

I had so many of my students ask how to put a placemark on GoogleEarth I went ahead and did this little demo.

GoogleEarth is very cool!