A special "Northern Lights Cruise" departs in December only but the "Seven-day classic voyage North," which will take you through northern Norway including Tromsø and North Cape -- the so-called northernmost town -- is available all year.
"Norwegian Caribou" by Ole Salomonsen, February 20 close to Tromsø, northern Norway. He says, "Here I am laying on the frozen ground shooting handheld. A very exciting experience lying this close . and feel this big animal breath in your face!