Open to the public each summer, Oscarshall is the Royal summer palace, which belongs to the Royal Family. Built back in 1852, it has been the property of the King since 1863 and is called an icon of neo-Gothic construction in the country. It is also among the most iconic National Romantic memorials of the country. If you’re in Oslo, you can visit the palace grounds, the main structure, an open pavilion, and a park that will lead you to the water.