Rovaniemi is the capital of the Lappish Finland and sits right on top of the official Arctic Circle border. It is a cosmopolitan and vibrant city with many shops, bars and restaurants. It also has a great sports centre with a pool, sports therapy department and spa.
If your staying for a few days then its worth visiting Ranua Wildlife Park which is only 82km out with the city. The Arktikum museum and Science Centre is perfect for expanding your knowledge of the Acrtic Conditions.
All visits to see Santa take place out side the city in places like Santa Park, Santas Village or Jolokka.