O'Hara's Tower

O'Hara's Tower - Credit: Wikimedia Commons

O'Hara's Tower was a watchtower in the British Overseas Territory of Gibraltar. It was located at the highest point of the Rock of Gibraltar, at what is now O'Hara's Battery, near the southern end of the Upper Rock Nature Reserve. Read more on Wikipedia

type: military installation
date from: 1787

Source: en.wikipedia.org