Take a tour of the top 5 attractions of Oslo, Norway. I'd like to show you the top 5 attractions of Oslo, Norway. royal palace - This beautiful building is the official residence of present Monarch. During summer, you can take an inside tour. Oslo harbor - one of city's great attractions, it offers many recreational activities. Many landmarks are situated along the harbor. city hall - center of political activity in Oslo. It's the location for many important ceremonies including the annual Nobel Peace Prize. akershus fortress - an imposing 13th century medieval fortress with great views. It has been used as a royal residence as well as a prison. vigeland park - take a stroll through this unique park, covering 80 acres of landscape design, it contains remarkable sculptures.