Leahill Turret, Hadrian's Wall
United Kingdom
The 186th tallest tower in the world
Leahill Turret is a typical example of one of the lookout towers located between the milecastles on Hadrian's Wall in Cumbria, located on the Lanercost Road near Banks, Parish of Waterhead. It is designated turret 51b and lies east of the Signal Tower at Pike Hill.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).