Armed Forces Museum

The strongest sections cover the two World Wars. The First World War display examines Norway's difficult position as a neutral nation with the world's third-largest merchant fleet — a neutrality that cost thousands of Norwegian sailors their lives as they continued trading with all sides. The Second World War section builds naturally into the adjacent Norwegian Resistance Museum, which picks up where Forsvarsmuseet leaves off.

The Cold War displays examine Norway's position as a NATO founding member with a direct border with the Soviet Union — a strategic situation that shaped Norwegian defence policy, civil preparedness planning, and daily life for four decades. This section of Norwegian history is relatively little-known outside Scandinavia and is particularly interesting for visitors from other NATO countries.

The outdoor collection is the most immediately striking part of the museum. Tanks, artillery pieces, aircraft, and naval vessels are arranged on the fortress grounds — including a Spitfire, several German vehicles from the occupation period, and Norwegian naval guns. The outdoor exhibits can be viewed freely as part of a general fortress visit even without entering the museum building.

The museum is particularly good for families with children who are interested in military hardware. The outdoor displays are interactive enough to engage younger visitors, and the indoor collection is not so text-heavy as to be off-putting. Combine a museum visit with lunch at the fortress café and a walk around the ramparts for a full half-day.

Practical details: the museum is free and open Tuesday through Sunday. Allow 1–2 hours for a thorough visit, less if you focus on the period that most interests you. The museum shop sells good quality books on Norwegian military history and the Resistance period in particular.