View of the Akershus Fortress, cannons and city skyline from inside the walls on a sunny day, Oslo, Norway, Scandinavia, Europe

akershus fortress oslo norway city skyline cannons scenic view sunny day historic site waterfront travel tourism landscape military history outdoor activity visitors exploring fortress walls greenery urban scenery european landmarks cultural heritage panoramic view history adventure sightseeing nature coastal historical landmark beauty sunlit architecture norwegian culture cityscape attractions sightseeing spots monuments exploration hiking pathways river arts culture fortifications recreational area historical sites tranquility iconic locations views open spaces families