A journey within the border of the Arctic Circle is an adventure itself, tackling it on the coldest days of the year, with temperatures as low as -30°C has made it even more fascinating. The Northern Lights are certainly breathtaking, driven by solar winds, you can admire them from the streets of Rovaniemi, even if to be truly amazed you have to move a few hundred meters from the center to the banks of the Kemijoki River, completely frozen to the point of being walked and crossed.