Midnight sun - Summer activity in Tromso As summer methods, there's a certain celestial phenomenon that waits for in the Arctic Circle: the Midnight Sun. Tromsø, situated in the heart of this mystical area, becomes a stage for this mind-blowing phenomenon, where the sun doesn't set for months, casting a heavenly radiance over the city and the bordering landscapes. With Arctic Cruise in Norway, you can dive into this all-natural marvel, experiencing it from the land, sea, or in sustainable style.