The Cabo da Roca Lighthouse () is a beacon/lighthouse located above the Atlantic Ocean, on Portugal's (and continental Europe's) most westerly extent (Cabo da Roca). It is located in the civil parish of Colares, in the municipality of Sintra, situated on a promontory that juts out into the ocean, made up of granite boulders and interspersed limestone. It is a third-order lighthouse, which originally began operating in 1772. It was the first new purpose-built lighthouse to be constructed in the country: the older lighthouses in existence at that time, were constructed on existing platforms or from pre-existing beacons.