fredriksten fortress (upper rock fort)

above ancient architectural architecture art artillery building buildings cannons canon castle city culture defenses detail entrancegate europe facade flag fort fortifications fortress fredrikstenfortress haldenmunicipality heritage high hill historical historically history house landmark landscape mountain nordic norway old outdoors panorama peace scandinavia soldiers stone stonewalls stronghold tourists town tradition trails upperrockfort view viewpoint visitors walkingpaths war stfoldcounty