Singen (Low Alemannic: Singe) is an industrial city in the very south of Baden-Württemberg in southern Germany and just north of the German-Swiss border.

Singen is an industrial city situated in the far south of Baden-Württemberg in Germany close to Lake Constance, just north of the German-Swiss border.

The most famous landmark of Singen is Hohentwiel, a volcanic stub on which there are the ruins of a fortress destroyed by French troops during the Napoleonic Wars.

Since the opening of the train station (1863) with the connection to the Baden railway network, Singen developed into an industrial community that expanded significantly, especially after the settlement of Maggi (1887).

Therefore, by decree of the Interior Ministry of the Grand Duchy of Baden on September 11, 1899, the municipality of Singen was granted city rights.

This route into Switzerland was discovered by Dutch naval lieutenant Hans Larive in late 1940 on his first escape attempt from an Oflag (prisoners' camp for officers) in Soest.

Larive did not forget and many prisoners later escaped using this route, including Larive himself, Francis Steinmetz, Anthony Luteyn, Airey Neave, Pat Reid and Howard Wardle in their escapes from Colditz Castle when Colditz was used in the war as Oflag IV-C.[5] Singen (Hohentwiel) is a junction station and important regional train hub.