Forte de São João Baptista de Esposende

Forte de São João Baptista de Esposende is a military fortification with a star-shaped design positioned at the mouth of the Cávado River, featuring bastions at each point and hexagonal guard structures along its walls. A red-painted cylindrical lighthouse with a concrete foundation stands on the southwest side, accompanied by a two-story residence for the lighthouse keeper.

Built between 1699 and 1704 during the reign of King Peter II, the fort served to defend the Cávado River entrance against sea-based attacks. It was constructed when Portugal was strengthening its coastal defenses against maritime threats.

The fort is named after Saint John the Baptist and reflects Portugal's historical linking of military defense with religious protection along the coast. Today it stands as a marker of how coastal communities organized their safety around both faith and fortification.

The site sits near the river bank and is easily accessible from the nearby town of Esposende, making navigation straightforward. Renovations are underway to develop exhibition areas and spaces for cultural programs, so conditions may change during visits.

The fortification was officially recognized as Immovable Cultural Heritage of Public Interest in 1982, highlighting its role in Portugal's military engineering history. This recognition led to its eventual acquisition and restoration efforts by the local municipality.