Santa Marta Lighthouse

The Santa Marta Lighthouse is situated to the south of the centre of Cascais, Lisbon District, Portugal, on the estuary of the River Tagus, providing a light for the Cascais Bay and for the town's new marina. It is a quadrangular masonry tower covered with white tiles, with blue horizontal stripes and a red lantern. The lighthouse was built on the grounds of the Santa Marta Fort, which now houses a lighthouse museum.

Source: Wikipedia