Feynman Platz in Munich
If you look hard at the intersection of Kanal, Mannhard, and Liebherr streets in Munich, you can convince your self that this resembles a Feynman diagram. While not officially named as such, some street signs and plaques informally designate the intersection as Feynman Platz (Feynman Place). Here is a Google Earth Placemark file for Feynman Platz. Right-click to download it to your computer, and then follow this tutorial if you don't already know how to load it into Google Earth.
Check out the diagram on the plaque --- it is a map of the intersection.
If you know more about this intersection, please let us know as well!