"Landgraben" in Karlsruhe, Germany
This is from a KVV (Karlsruher Verkehrsverbund) map from 2007 which used map data from "(c) 2003 Navteq / PTV AG / Map & Guide".
The marked street "Landgraben" exists but it is only a small service road with some parking spaces. It belongs to the "Kapellenstraße". There used to be an open ditch here called the "Landgraben", but is has long been closed. See . This might be a case of Copyright Easter Eggs.
"Winzerallee" in Ettlingen, Germany
Google maps and TeleAtlas Maps show a "Winzerallee" in Ettlingen. In reality there is no street there, just a staircase going up the side of the hill. Its rather unlikely that that staircase is called an "Allee" ("avenue") so this is probably a case of Copyright Easter Eggs.