Ribas redoubt is a noteworthy field fortification with a magnificent view over a vast rural landscape. It is situated on the top the Ribas hills and overlooks the Freixial pass which, at the time, was the main access route between Montachique and Bucelas. The perfect place to take in the surrounding countryside that, at the beginning of each Spring, presents the visitor with the sight of an enormous blanket of wild orchids.
This fortification was part of the 2nd Line of defence and established visual contact with several other military positions on the junction of Malveira and Montachique. It has a notable trench surrounding it and it is also unique in that it sits on a limestone platform that was excavated specifically to facilitate its construction.