Gyldenløve Fort is located in Halden and is a historical landmark with great significance for Norway's military history. Construction of the fort began in 1661, and it was named after the Danish nobleman Ulrik Fredrik Gyldenløve. The fort was strategically located to protect the border with Sweden and has been an important part of the country's defense through several wars.
The fort is known for its impressive architecture and extensive fortifications, which include bastions and walls. Today, Gyldenløve Fort is a popular destination for visitors who want to learn more about Norway's history, as well as enjoy the beautiful views of Halden and the surrounding area. The area around the fort also offers hiking trails and opportunities for outdoor activities, making it an attractive place for both locals and tourists.