The Castle of Thun is a historic fortress located in the town of Thun, Switzerland. Built in the late 12th century, it served as a strategic military stronghold and residence for the local nobility. The castle features a distinctive octagonal tower and well-preserved medieval architecture, making it a popular tourist attraction. Today, the Castle of Thun houses a museum that showcases the region's history and culture. Visitors can explore its various exhibits, including artifacts from the Middle Ages and Renaissance. The castle also offers stunning views of the surrounding Lake Thun and the Bernese Alps.