Since Google began mapping the world with Google Earth and Google Street View, an entire pastime - Google mystery hunting and debunking - has cropped up. From unidentified flying objects to people with horse heads, there's no shortage of weird things that have appeared on Google Earth and Street View.
UFO Over Sydney
This flying-saucer-like shape was spotted on Street View near Sydney's Harbour Bridge in Australia. Typical lens flare or sign of extraterrestrial life? The truth is out there.
See also: The 16 strangest sights in Google Earth