Forte Santa Catarina
The fort of Santa Catarina was built in 17th century on the site of a 15th century defensive structure and chapel dedicated to Saint Catherine of Alexandria. It was one of the various forts built around this time to protect the area from raids by pirates and privateers.
Today it is possible to climb up a steep set of steps to walk around the battlements. There is no museum here, but an old canon provides a quick photo opportunity and the views of the marina and the cliffs of Praia da Rocha make the hike worthwhile.