Wellenberg Tower
Switzerland
The 186th tallest tower in the world
The Wellenberg Tower was possibly part of the early city fortifications of Zurich. It stood between today's Münster Bridge and the Quaibrücke at the height of Schifflände Square on the Limmat and was only accessible by boat.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).