Hangout Quest is a Google+ game that allows participants to go on a virtual scavenger hunt inside the Palace of Versailles. The object of the scavenger hunt is to find artwork and other objects in the palace. If players invite others to their Hangout, they can compete in a race to find the objects. Hangout Quest uses the Street View imagery of Google Maps to bring players inside the Palace of Versailles. Hangout Quest also includes Google's facial tracking technology, which allows players to move around in the Palace of Versailles by moving their head instead of clicking around with their mouse.
a collection of six examples of science based Google Maps. The collection includes examples of use in environmental science and geology lessons. One of my former colleagues also used Google Maps in geology lessons.