The Lyon Metro map (March 2012, 4 stars) on the platform at Croix-Paquet station – reputedly the steepest Metro station in the world, with a 17 percent grade! Although nominally part of Lyon’s Metro system, the “C” Line is really a refurbished rack-and-pinion funicular, with the earliest trains running as far back as 1891.

Source: BrusselsBen/Flickr