View of the Forte Sao Juliao da Barra (Saint Julian Fort) at the eastern end of Carcavelos beach. Presumably the fort is set here to defend the entrance to the Tejo river and Lisbon a few Km upstream.
Carcavelos is one of the most popular beaches around being the closest large, sandy beach to Lisbon. If you look the opposite direction from here there is a large stretch of golden sand.
The beach here is also one of the best surf spots in Portugal. Consistent throughout the winter, this beachbreak is known for its powerful, barelling waves.