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

akershus fortress oslo norway fortifications historical architecture scandinavia european history sunny day tourism travel destination cultural heritage scenic views outdoor exploration cobblestone paths vibrant gardens military history medieval structures visitor attractions sightseeing relaxing atmosphere nature ancient walls historic sites oslo skyline peaceful surroundings nordic history castle views cultural sites local attractions discovery summer weather heritage site evening light urban landscape park area architectural beauty green spaces guided tours iconic landmarks visitor experience ancient fort open spaces landscape panoramic views historical tour landmark visitation cityscapes tranquil environment historical significance outdoor activities