While Goldstream Valley near the Alaskan city of Fairbanks is well-known for aurora hunting, hopping on a snowmobile to search for the lights adds an extra dimension of excitement. Far away from the distracting, artificial lights of civilisation, guided tours allow adrenaline-seeking visitors to whizz through snow-blanketed landscapes and powdered pine forests as ribbons of vibrant green light dance across the sky above. Be sure to wrap up warm as temperatures are likely to drop well below zero and the pit stops for coffee and cocoa at various viewpoints can only do so much to warm you up.