Elise M.
Google
The views from the fortress are pretty spectacular. There are picnic tables, so you could bring a picnic lunch or snack and enjoy a picnic. The museum is free. They sell a limited amount of snacks and they do not accept credit cards - only cash or VIPs - which is the mobile wallet for Norway. The display in the museum is not that much. We hiked up the hill to the fortress on a very hot day. The cafe did not have cold water, but we were allowed to take a couple of the cups used for coffee and fill them from the taps in the bathrooms.