Here's a simple but effective idea: walk the whole breadth of London taking a photo every eight steps, then stitch it all together into a short film. That's exactly what geographer Daniel Raven-Ellison accomplished, taking a two-day journey from Grange Hill to Sutton that passes through West Ham, the Olympic site, Spitalfields, Soho, Putney and Wimbledon. (Shhh, don't tell him about Seety.)
The walk is part of a larger project named URBAN EARTH (the baffling capitals are theirs, not ours). Mumbai, Bristol and Mexico City also get the treatment. The aim is to show these cities from a new perspective, "(re)presenting cities to show what they are really like for the people who live there - a direct challenge to the media that distort the reality of the places in which most of us now live".
We reckon they should phone up the Proclaimers, who are on record offering to walk 500 miles and then 500 more, probably across gritty Glaswegian council estates. They could provide a catchy soundtrack too.