Castillo de los Duques de Alba
Spain
The 186th tallest tower in the world
Castillo de los Duques de Alba is a castle-palace in Alba de Tormes, Salamanca province, western Spain. It is the ancestral seat of the House of Alba. Today, the castle is in ruins and can be visited by the public.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).