During the long hours of night watch on open ocean transit we used to play a game with our navigation system. Zooming into some obscure part of the world at a range of two nautical miles the player would try to guess the location as we zoomed further and further out. Lame as it was it passed the time. Sadly the game got old after about once. Luckily there’s now the Google Earth Geo Map Quiz. A Google Earth puzzle where you try to find and match obscure areal photos using a few almost passive geocaching like clues.
Place Spotting: Passive geocaching