Mervinslaw Pele
United Kingdom
The 186th tallest tower in the world
Mervinslaw Pele, also known as Mervinslaw Tower, is a 16th-century castle in the Scottish Borders. It is mostly intact except for its roof. It is 7.77 metres (25.5 ft) by 6.5 metres (21 ft) with walls about 1.2 metres (3 ft 11 in) thick. It is two storeys tall, plus a garret. There are no stairs, and access was thought to be via ladders. There is no fireplace, but there is evidence of a hearth. There is evidence of other buildings existing nearby. It belonged to the Olivers.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).