interesting article on "Online LIDAR Map Leads to Maya-related Discovery" from the New York Times. No paywall. [nytimes.com]
The sites of French fortresses of Louis XIV's time have been found from studying aerial photos. You can also sometimes locate the sites of ancient forests, using Google Earth.
@dede18Once, I was "driving" down a street in Belfast, N.I., and a pair of girls on the sidewalk, flipped the 'bird' at the Google camera car!