Forte da Ponta da Bandeira (Flag's Mast Fort), Lagos (must see)

Flag’s Mast Fort stands at the mouth of the Bensafrim River, in full view of the Atlantic, guarding the narrow entrance to Lagos harbour. Built in the late 17th century and completed in 1690, the fort reflects the strategic importance of Lagos at a time when the Algarve coast was frequently targeted by pirates and corsairs. Lagos then served as the seat of the military government of the Algarve, making strong coastal defences a priority following the restoration of Portuguese independence from Spain.

Positioned to control both river and sea access, the fort was designed to protect the docks and quays along the riverbanks while establishing effective crossfire with the redoubts of Lagos Castle and the city gates. Upon completion, it was considered one of the most effective defensive structures in the region.

Built on a square plan, the fort features thick stone walls, corner turrets, and firing platforms carefully arranged to cover approaching ships and potential landings. A narrow drawbridge once connected it to the shore. Its name derives from the flag mast that flew signals to announce arrivals and warn of danger.

Today, access to the fort is gained via a permanent stone bridge followed by a wooden drawbridge. Although the drawbridge mechanism is no longer operational, it remains one of the few surviving examples of its kind in the region. Looking down, you can also observe the dry moat that surrounds the fort, designed to prevent land-based attacks.

As you enter the fort and face the ramp leading to the terrace, an arched doorway appears in the far-right corner. Behind it lies a small chapel dedicated to Saint Barbara, the patron saint of armourers, artillery soldiers, and miners. The chapel’s walls are lined with traditional blue azulejo tiles.

Finally, following the ramp upward brings you to the fort’s terrace. From here, views extend in all directions, encompassing Meia Praia Beach, the historic city walls, and the entrance to Lagos Marina. At each of the four corners of the fort stand small cylindrical lookout towers capped with conical roofs, once used by sentries to watch for approaching ships or pirate vessels.