Sesimbra Castle is a historic fortress located in the town of Sesimbra, Portugal. Built in the 12th century, it was constructed to protect the region from invasions and to oversee the surrounding area. The castle features impressive walls and towers, offering stunning views of the nearby coastline and the Arrábida Natural Park. The castle has undergone various renovations over the centuries, reflecting different architectural styles. Today, it is a popular tourist attraction, allowing visitors to explore its ancient structures and learn about its rich history. The site also hosts cultural events, enhancing its significance in the local community.