Aarau Castle is a historic fortress located in the city of Aarau, Switzerland. Built in the late 13th century, it served as a residence for the local nobility and played a significant role in the region's history. The castle features a distinctive round tower and well-preserved medieval architecture, making it a notable landmark. Today, Aarau Castle houses the Aargau Art Museum, showcasing a collection of Swiss art and historical artifacts. Visitors can explore the castle's grounds and enjoy panoramic views of the surrounding area, making it a popular destination for both tourists and locals.