Huth Fort is located on the southern tip of Kjerringholmen in the Vesterelva River, between Kråkerøy and Gressvik. Built between 1788 and 1791, the fort was never completed, but it is constructed of rough-hewn granite and a battery wall. Huth Fort was part of the outer fortifications of Fredrikstad Fortress and was first established to protect the Norwegian fleet during the Napoleonic Wars.
The fort played an active role in the defense during the Swedish attack in 1814. It is named after Major General Heinrich Wilhelm, who has contributed to the fort's historical significance. Huth Fort stands as an important monument to Norway's military history and is an example of military architecture from the late 18th century.