Midnight sun - Summer activity in Tromso As summer methods, there's a particular celestial phenomenon that waits for in the Polar circle: the Midnight Sun. Tromsø, situated in the heart of this mystical region, becomes a stage for this amazing sensation, where the sun does not established for months, casting a heavenly radiance over the city and the bordering landscapes. With Arctic Cruise in Norway, you can study this all-natural wonder, experiencing it from the land, sea, or in lasting style.