Fredriksten Fortress is a historic fortress located in Halden, Norway. Built in the 17th century, it was designed to protect the region from invasions, particularly during conflicts with Sweden. The fortress features impressive stone walls and several buildings, including barracks and a chapel. Today, Fredriksten Fortress is a popular tourist attraction, offering stunning views of the surrounding landscape. Visitors can explore its well-preserved structures and learn about its history through informative displays. The fortress also hosts various events and festivals throughout the year, making it a vibrant part of the local culture.