Three itineraries. Three cities whose conformations prompt us to follow given three well definied lines, so well defined they are able to be synthesized graphically into three signs: a horizontal stroke, an eks and a circle. It is along just a line from west to east that the Tamigi cut the city of London. A reportage noticing being surprised at how the urban landscape changes. Seen from above, Zurich extends along a north-eastern branch and a south-western branch. The circle is the maximum simplification for the bypasses, not geographicals borderlands of Milan.