This is a map of the frequencies of paths over 500 visitors have followed at Duisburg Zoo. The nodes are the animal locations, the size of the spheres gives the number of visits. A unique feature of Duisburg Zoo is, that the zoo is devided by an autobahn into two parts. There is a single bridge crossing the autobahn, linking the two parts (between the Kodiakbears and Flamingos). As the sheet, on which we asked the visitors to draw the path did not include the autobahn and the bridge there are some (smaller) paths on this map which cross the autobahn without following the physical route.