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

akershus fortress oslo norway courtyard flowers historic architecture sunny day scandinavia europe stone walls castle landscaping outdoor scenery greenery tourist attraction sightseeing culture history vibrant colors guided tours medieval fortress grounds scenic views travel destination peaceful environment natural beauty heritage site exploration city views courtyard garden sunny weather architecture details local flora vibrant landscape urban nature historical site ancient walls visitor experience background serene setting colorful blooms stone pathway day trip outdoor exploration scandinavian culture fortifications historical significance green spaces flora variety seasonal blooms