Monuments

A sixteenth century construction on a rocky island in the river, designated a building of public interest and located in a Special Conservation Area. On the inside the building is octagonal, with three niches in the wall facing the river. The chapel is covered by a cupola, which can be reached by means of a spiral staircase.

The tower was built to provide light to warn boats navigating the river, and is unique in Portugal. It is now on dry land.