The Castle of Lagos, also known as Fortaleza Ponta da Bandeira, is a historic fortress located in the coastal town of Lagos, Portugal. Built in the late 17th century, it was designed to protect the harbor from invasions and pirates. The castle features thick walls, bastions, and a picturesque view of the Atlantic Ocean. Today, the Castle of Lagos is a popular tourist attraction, showcasing the rich maritime history of the region. Visitors can explore its well-preserved architecture and learn about the strategic importance of the fortress during the Age of Discoveries.