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This is a winter wonderland. Nordic skiing is among the most exotic winter experiences you can have Alaska. Or maybe snowmobiling across the frozen river? Take your pick. Chase the Northern Lights (undisturbed by city lights), or take part in a community class such as pie making. The city offers many zip-line tours in the winter. If you want spectacular pictures of frozen rivers and amazing nature, in general, go flightseeing above the Alaska Range.