Man, I used to browse Google Earth endlessly years ago at this computer lab proctor job I had. One day I just followed this Australian outback road that crossed the desert from Alice Springs to the coast, it was so vacant that the only landmarks were gas depots and an occasional village every 100-200km or so.
Lately I play around with Google Earth's time feature and see how much Austin and other places I've lived have changed since 1995
Some of my favorite places to view are airports and air bases - Edwards AFB is pretty cool, has a giant compass painted on a dry lake and there's a plethora of secretive sites to browse in the Nellis Test Range: atomic test craters, a fake DPRK airfield and bombing ranges. There's this scale model of the topography of part of China in one of their military bases - literally a google map aerial within a google map aerial
Good blog here
This is interesting google street view compilation by Jon Rafman
Also, you can't look it up anymore because France and other countries have blurred their military bases out, but this was on a hanger at a French Air Base
1. They are taunting whoever took the satellite image
2. Prank on a specific squadron - notably this base hosted a Singaporean training unit so perhaps they were the target.