Midnight sun - Summer activity in Tromso As summer season methods, there's a specific holy phenomenon that awaits in the Polar circle: the Midnight Sun. Tromsø, situated in the heart of this mystical area, ends up being a stage for this amazing phenomenon, where the sun does not set for months, casting an angelic glow over the city and the surrounding landscapes. With Arctic Cruise in Norway, you can study this natural wonder, experiencing it from the land, sea, or in lasting design.