Download Google Earth at http://earth.google.com and install the program on your computer to get your students started with virtual tours! 
 
For specific information and place markers for the city of Paris (le Métro, Versailles, RER stations, and much more), download the KMZ file at  
 
http://www.pariserve.com/map.htm 
 
For more information and lesson ideas for using Google Earth in the classroom, check out: 
 
http://www.juicygeography.co.uk/googleearth.htm 
http://www.gelessons.com/ 
http://www.telscenter.org/confluence/display/Tech/Google+Earth 
 
Whether you're planning to take students abroad or just want to create engaging, dynamic lesson for your students, Google Earth is a wonderful classroom resource!