Prospect Tower
United Kingdom
The 186th tallest tower in the world
Prospect Tower is a folly on the Cotehele Estate. It has three sides and is 60 ft high. When the National Trust was given the Cotehele Estate in 1947 the Trust renovated the tower and constructed a wooden spiral staircase inside, to allow visitors. The Tower was last renovated in 2018 and is still open to the public.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).