You know where we're going but what are we doing?

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Across
  1. 3. Extreme relaxation activity practiced in frozen lakes.
  2. 6. A natural phenomenon that creates colourful lights in the sky
Down
  1. 1. An extravagant, temporary structure made entirely of frozen water, often found in Scandinavian regions
  2. 2. Region in Northern Europe known for its snowy landscapes, reindeer, and association with Santa Claus
  3. 4. circle A circle of latitude near the top of the world, where the polar climate is extreme
  4. 5. A cold-weather vehicle often used for travel over snow and ice
  5. 7. A place where people go to relax and experience hot steam in winter