Midnight sun - Summer activity in Tromso As summer season strategies, there's a certain holy phenomenon that waits for in the Polar circle: the Midnight Sun. Tromsø, situated in the heart of this mystical region, ends up being a phase for this mind-blowing phenomenon, where the sun does not set for months, casting an angelic glow over the city as well as the surrounding landscapes. With Arctic Cruise in Norway, you can dive into this natural wonder, experiencing it from the land, sea, or in sustainable style.