The church, very clearly influenced by the Mudéjar style, is dedicated to Saint Denis, the patron saint of the town. The main splayed doorway is topped by a small porch roof. The whole is rather lacking in grace but note the strange corbels level with the roof.

The popular trail leads from the visitors' centre at La Rocina (on the road from El Rocio to Ayamonte) to a relaxation area and birdwatching hides. You walk for about 14km.

Built in 1792 by the local architect Torcuato Benjumeda, the Royal prison was the first neoclassical building in Cadiz and is wholly representative of this style in Andalusia. The facade is preceded by a sort of arch of triumph which has four great columns supporting it in the Tuscan style and topped with two lions, who flank the shield of the Spanish monarchy. Inside, the courts set up in 1990, are laid out around a large patio and two side patios.

The church has been thoroughly altered since it was first built, although it has kept the Isabelline north door from the original Gothic edifice. The Isabelline style, which owes its name to Queen Isabel the Catholic, is characterised by exuberant decoration that mixes Flamboyant influences with Mudéjar features (executed in the Arab tradition).