Built during the reign of Dom João IV, this fortress still maintains its primitive structure with its scuttles, its patrol walk and its stairways. The barrack, located in the middle of the stronghold and of the two waters rooftop, is very well preserved.

The farol de Santa Marta is one of the oldest in the municipality and played an important role in the safety of Cascais and the guidance of boats to dry land. Despite maintaining its functions, currently houses a museum space dedicated to five centuries of Portuguese headlights life, its history and heritage value.

When the Portuguese maritime expansion had its peak, in the 16th century, Cascais was one of the first places to have a lighthouse. The Guia lighthouse was built in 1610 and a small hermitage was built in the surrounding area with the following inscription: "Guide of the seamen".

A palace built on the site of the demolished Fortress of Our Lady of Conceição, it was acquired in 1868 by the Duques of Palmela in order to build a summer residence there. The project belongs to the English architect Thomas Henry Wyatt. With a revivalist English architecture, this building is covered by masonry. In the main raised wall one can view, above the door, the coat of arms of the family of the Duchess of Palmela.

The Strong winch primitive only the outer walls and a stone plaque over the door. This Fort was the defense line of the Atlantic coast.

Tide gauge 19th century circular plant, with cylindrical volumetry covered by a dome semiesférica. Features a back arch portal framework with limestone and two Windows of your chest in a semicircular arch. Inside, you will find the tide gauge itself, a mechanical system based on buoys, sprockets and clockwork.

Watchtower also known as Lookout from the mouth of hell, which is integrated in the defensive system of the bar Tejo. Although badly damaged, preserves the original structure.

Of the ancient medieval wall there are only some vestiges left, including one of its gates. Rather damaged by the partisan guerillas in 1580, it was rebuilt after the Restoration.

Large estate surrounded by a masonry wall hiding the building of housing and construction. Develops on four floors and differentiated coverage features and staggered with one, two, three and four waters. He currently is vacant.

Tower built in 1917 by George O'Neill, according to Raul Lino project. Features L plant, common plant cloister hinged rectangle and a square plan adossado body, with two roofs and three waters. Around the House there is a garden that forms a nice public park.