Burg Maus (2010)
River Rhein, Germany

Construction was started by the Trier Electors on what was to be the castle above the town of Wellmich in 1353 and continued for more than 30 years.  The nearby Counts of Katzenelnbogen joked that this castle was the mouse that would be eaten by the cat.  The name stuck.  Today it has been faithfully restored and is one of the finest examples of a fortified building along the Rhein.