Burcht van Leiden
Netherlands
The 186th tallest tower in the world
The Burcht van Leiden (Dutch pronunciation: [ˈbʏr (ə)xt fɑn ˈlɛidə(n)]; Fort of Leiden) is an old shell keep in Leiden constructed in the 11th century. It is located at the spot where two tributaries of the Rhine come together, the Oude Rijn and the Nieuwe Rijn. The structure is on top of a motte, and is today a public park.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).