A Bismarck tower is a special form of the Bismarck monument. Out of 240 Bismarck towers, 173 are still available today. In the Federal Republic of Germany 146 of formerly 184 towers are still preserved. Wikipedia
The Bismarck Tower on the Hardthöhe stands on the border between Barmen and Elberfeld.
The view from this tower over Wuppertal is magnificent.
Unfortunately the tower is e.g. Not accessible at the moment ...