Not sure if this has been mentioned before but google seem to have driven their streetview van right through the circle at Stonehenge!!! ;)

http://maps.google.co.uk/?ie=UTF8&ll=51.17904,-1.82619&spn=0,359.998259&z=19&layer=c&cbll=51.178965,-1.826197&panoid=hY7iSSfHKg_hKOtFMCXl0w&cbp=12,119.04,,0,-12.25