Torre Tavira

Torre Tavira is the most famous of the roughly 160 lookout towers that merchants built on their town houses in the eighteenth century. In those years Cadiz held the monopoly on trade with the Americas, and shipowners climbed their own towers to spot approaching sails and cargo ships long before they reached the port. The Tavira tower, at about 45 metres above sea level, is the highest point of the old town and was designated the city's lookout in the 1700s, which is why it became the one that visitors can climb today. At the top you get a full circle of terraced rooftops, the cathedral's golden dome, the bay, and on clear days the line of the Atlantic coast.

The main attraction at the top is the camera obscura. A periscope-like lens on the roof captures the live view of the town and projects it, in a darkened circular room, onto a concave white dish. The guide rotates the lens and talks you through the streets, plazas and monuments as they pass across the dish, explaining the history of the watchtowers and the merchant families behind them.

It is a very old optical trick, but seeing pedestrians, gulls and washing lines move across the screen is oddly captivating, and it works best on bright sunny days when the image is crisp.

The product linked here is a Cadiz walking visit that includes the Tavira tower and the camera obscura, so it is one way to see the tower with a guided context. Entry is generally by timed session, so arriving a little early matters in busy months. The climb is a staircase and there is no lift, so those with limited mobility should check access in advance. For photographs, the open terrace at the top gives the best rooftops-and-sea shot in the city, while the camera obscura room itself is for watching rather than filming.

A few practical points will help you get the most from the visit. Sessions are timed, and the camera obscura show runs in a group, so the order you climb and the time you arrive affect your experience. Weekends and school holidays are busier, and a morning arrival tends to be calmer. Because the whole point of the camera obscura is the live image, avoid hazy or rainy afternoons if you can choose, and consider keeping the tower for a clear day while using cloudy days for the museums and food.

The tower sits in a residential street, so the approach is part of the pleasure: you pass through lanes of small shops and houses, with glimpses of the sea.

Once at the top, take a few minutes to look in all directions. To the north you see the bay curving toward El Puerto de Santa Maria; to the west the Atlantic spreads out beyond the sea walls; and to the south the long city beach glimmers in the distance. Look for the dozens of other rooftop towers, each of which once served a trading family.

Photographers should bring a lens that handles bright sun and avoid shooting directly through the glass in the camera obscura room. Families often make this a first stop, because a short, vivid experience sets the tone for a day of walking.