Marmion Tower
United Kingdom
The 186th tallest tower in the world
Marmion Tower, also known historically as Tanfield Castle, is a 15th-century gatehouse near the village of West Tanfield in North Yorkshire, England. It survived the destruction of the surrounding fortified manor and is now managed by English Heritage.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).