The Castelo de Guimarães is a historic castle located in the city of Guimarães, Portugal. Built in the 10th century, it played a crucial role in the formation of the Portuguese nation. The castle features impressive stone walls and towers, showcasing medieval military architecture. Surrounded by lush greenery, the castle is a popular tourist destination and a UNESCO World Heritage site. Visitors can explore its well-preserved structures and enjoy panoramic views of the surrounding area, including the nearby Palácio dos Duques de Bragança and the charming streets of Guimarães.