Geotagging explained by the Guardian’s Jemina Kiss (who obviously overcame writer’s block to get this one down):

“Should you ever be at Stonehenge, looking out across Salisbury Plain and wondering when the stones were excavated, you can pull out your mobile phone and go to wikinear.com. It knows you are at Stonehenge and shows a reel of articles from which you will learn that William Cunnington and Richard Colt Hoare conducted the first recorded excavations in 1798. Clever stuff.”