Carleton Martello Tower
Canada
The 186th tallest tower in the world
Carleton Martello Tower in Saint John, New Brunswick, is one of the nine surviving Martello Towers in Canada. The tower dates from the War of 1812 and played a significant role in conflicts until the Second World War. The site now features a restored powder magazine, a restored barracks room, and exhibits in the tower and in the visitor centre. The tower's roof offers a view of the city of Saint John and its harbour. Carleton Martello Tower is one of the oldest buildings in the city and has been designated as a National Historic Site of Canada since 1930. It has been open to the public since 1963.
Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).