London is a city of complex structures, partly dating back to medieval times, with few long vistas but a multitude of destinations and attractive areas. With more than 27 million visitors a year, walkability is important. It’s well known that London’s “tube map” is one of the best wayfinding diagrams in the world. But the above-ground terrain has been less well served. Surveys conducted in conjunction with the Legible London program showed that more than 40% of people have been using the tube map for walking, too.