Guimaraes Castle is a historic fortress located in Guimaraes, Portugal. Built in the 10th century, it played a crucial role in the formation of the Portuguese nation. The castle features robust stone walls and towers, showcasing Romanesque architectural style. It served as a defensive structure against invasions and was a residence for early Portuguese nobility. Today, Guimaraes Castle is a popular tourist attraction, offering visitors a glimpse into Portugal's medieval past. The site is part of the Guimaraes UNESCO World Heritage Site, recognized for its cultural significance and well-preserved structures. Visitors can explore the castle grounds and enjoy panoramic views of the surrounding area.