Considering the Hotel Duque de Najera in Cadiz?
A VT member wrote the following comment about visiting Cadiz:
Watchtowers. by Beach_dog
Many of the buildings have towers, the purpose of which were to afford good views of the ships coming into port. The houses were the homes to the merchants and traders who lived in Cadiz during the busier centuries when it was a great trading port. Many of the merchants had these towers incorporated into their homes so they could watch for the return of their ships.
The small buildings at the tops of the towers are called Garitas, due to their similarity to sentry boxes used by the military. They were there to cover the top of the stairways.
You can only really appreciate the towers from a high vantage point, so I suggest you view them from Torre Tavira or the Cathedral tower.