Church located near the Fort of São Sebastião. One of its most important features is the rich interior decoration with tempera murals adorning all the elevations.

Located within the castle itself, this is a space where you can learn more about the history of Castro Marim. Here you can appreciate documents, drawings and engravings displayed on the walls, archaeological artifacts and historical-ethnographic pieces exhibited in various showcases, from the Late Bronze Age, the Iron Age, the Roman period, among many other historical periods.

The main church has quite peculiar architectural details. The narthex is Renaissance, although quite altered, the chancel has a lunette vault and has Neo-Manueline elements in the parapet of the south facade.

An important work in the renovation of the town's military defense system, as evidenced by its proximity to the castle and the wall. An irregularly shaped fort with five bastions.

The outer wall, semicircular in shape, surrounded the medieval village and the so-called Old Castle. Today, only the remains of the castle with four turrets and a gate, the ruins of the Church of São Tiago, a 14th-century construction, and the Palace of the Mayors remain. The Castle offers a unique viewpoint over the Guadiana River, the village, the salt pans, and vast sea horizons.

A 16th-century church with a single nave, pilasters at the corners, a main façade finished with a gable and cornice, with openings forming a central axis consisting of the Mannerist portal surmounted by a niche with an image of Our Lady of Mercy. The interior is completely stripped of its former structure and decoration, preserving only the chancel arch, a perfect arch on pilasters, with traces of paint.

The museum, inaugurated in 1990, aims to preserve the past and showcase the history of the military personnel of this force. There is a room dedicated to honoring soldiers who died overseas.

Located on a rocky Islet in the river Tagus, a Templar Castle warrant lift by Gualdim Pais, in the 12th century. Previously, it is believed to have existed a castro lusitano, improved by the Romans. The walls are flanked by ten towers that surround the keep and which gave the set an important defensive capabilities. Inside, there are several monumental doors that make communication between the different parts of the Castle. The access is made by river in a small boat crossing, lasting about five minutes.

This Renaissance church was founded by Dom Pedro de Menezes in 1528. It has a unique facade, where the gable slopes symmetrically down to the pillars, opening into two arches. Of particular note are the carved stonework, the star-vaulted ceiling of the chancel, the early 17th-century tiles, the pulpit, and the wooden balcony.

At the Aliança Underground Museum, visitors can explore different artistic worlds, with a wide range of activities throughout the year. In this museum, sparkling wines, still wines, and brandies are perfectly integrated with seven art collections, including archaeology, ethnography, mineralogy, paleontology, tilework, and ceramics. It showcases the various grape varieties, allowing visitors to journey through the world of aromas and nectars produced in the region.