Oponice Castle
Slovakia
The 186th tallest tower in the world
Oponice Castle (Slovak: Oponický hrad or hrad Oponice) are the ruins of a castle located on the western spur of the Tribeč mountain range above the village of Oponice in Slovakia. The first written mention of the castle dates back to 1300. The Csák family is considered to be the founders and first owners of the castle. After the death of Matthew III Csák, Miklós Gutkeled became its owner in 1329, from 1389 it was owned by Dezider Kaplay and from 1392 it passed into the ownership of the founder of the Apponyi family, Miklós Cseklészi.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).