The Tavira Tower is the highest watchtower in the old city of Cádiz (Andalusia, Spain), 45 metres above sea level, and the second highest point, only surpassed by the towers of the Cathedral, at 56 m high. It is located in the Casa-Palacio de los Marqueses de Recaño (currently under construction for the future carnival museum), on the corner of Marqués del Real Tesoro and Sacramento streets, and was built in the 18th century in the Baroque style. Designated the official watchtower of the port of Cadiz in 1778 as the highest tower, it is named after its first watchman, frigate lieutenant Antonio Tavira.

It currently houses the Camera Obscura, one of the most symbolic tourist attractions in the city of Cádiz, as well as two exhibition rooms and a viewpoint from which the entire historic quarter of the city can be admired.

The Camera Obscura was inaugurated in 1994 and consists of an optical system that reflects on a circular white screen the scenes taking place outside in real time, during 15-minute sessions. The exhibition rooms show the development of the city of Cádiz and its history in general and of the Tower in particular during the 18th and 19th centuries through information panels. The original spyglass and the watchman's logbook can also be admired, as well as 19th century and contemporary photographs showing the changes that the city has undergone over the last century.