Trajectum Lumen. Utrecht. It's a path through the city center marked by little lights in the pavement. Not all guides work, but most of them do. It's possible to download the map or an application on the site http://www.trajectumlumen.nl/portal. Inspired by the images of Nicolas "Sparth" Bouvier, I went to the beginning of the tour. The first idea was to take pictures of the things you can see of the route, but changed my mind a bit. Will take the tour again soon.
First serie inspired by Nicolas Bouvier:
And some more sight-seeing: