Torra di Sponsaglia
France
The 186th tallest tower in the world
The Tower of Sponsaglia (Corsican: Torra di Sponsaglia) is a ruined Genoese tower located on the border between the communes of Bonifacio, Corse-du-Sud and Porto-Vecchio on the south east coast of the Corsica. Only the round base survives. The tower was one of a series of coastal defences constructed by the Republic of Genoa between 1530 and 1620 to stem the attacks by Barbary pirates.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).