Great photo..  I agree on the door.  I think it's there to "set your mind" on entering a world of imagination and enchantment when you walk in.  Even though there's no snow, the blue lights give off a vibe of a winter wonder land or an illuminated heavenly realm.   This would be a wonderful place to bring children to, but also for adults to clear their minds and set their moods to a positive place, or to get creative inspiration.