Ruin Tower
Russia
The 186th tallest tower in the world
The Ruin Tower is an 18th-century monument in Ekaterininsky Park of Tsarskoye Selo - now Pushkin, a suburban town in eponymous borough of St. Petersburg, Russia. It was designed and constructed in 1771-1773 by German-Russian architect Yury Felten.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).