Tower of Narigües - Credit: Wikimedia Commons
The Tower of Narigües () was an albarrana tower in Madrid. Its remains are along the old Muslim wall of Madrid. Located at 83 Calle Mayor, next to the Segovia Viaduct that crosses Calle de Segovia. It was separated from the wall itself, but joined to it through another wall. It served as a watch tower. Read more on Wikipedia
Source: en.wikipedia.org