time than Foursquare. it is linked with Foursquare though so combines the tips from there too. Walking in London As a general point - I honestly believe we're losing our ability to navigate. I remember 7 or more years ago, taking an architect to see one of my projects - he insisted traveling by car with a 'Tom-Tom' sat-nav gadget and we got lost, despite my verbal directions which he refused to accept, because he was too engaged with his 'Tom-Tom', despite the fact that I'd spent 2 years traveling to the project with a tube map and a tube. Obsessions with technology can be ridiculous and myopic. Walking in London of all the satnaves I have used under "stressful" conditions - unfortunately tomtom appear to the the least reliable time and time again! give me Garmin every time - fast & accurate s - if you have one of these machines, how often do you update the maps? if not quarterly - then stop using them! I say a taxi driver (london black cab) drive up a one way bus lane the wrong way - when I challenged him, he said he was following his satnav (it was a tomtom! Walking in the Sahara If you take a Sahrawi child, blindfold him/her and drive them for a few hundred kms or more in any direction in the vast desert, then remove the blindfold, they'll find their way home. Obviously, they may struggle in Higher Barnett in the rush hour,