Bismarck Tower
Le Ban-Saint-Martin, France
The sole surviving Bismarck tower in France is in the commune of Le Ban-Saint-Martin near Metz. The tower was erected in 1902 when the area was part of Alsace-Lorraine, a Reichsland of the German Empire. Though accessible to modern-day visitors, the Bismarck Tower of Metz is in a semi-ruined state, damaged by vandals and weathering.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).