Lake Superior's dazzling ice caves

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    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves
    • Lake Superior's dazzling ice caves

    • Ice caves of Lake Superior

      Along the coast of Lake Superior, hikers are trekking a mile across the frozen water to see the breathtaking spectacle of ice-covered caves.

      Lake water has seeped into cracks in the sandstone and frozen on the walls and ceilings.

      More: Hikers make rare visit to ice caves of Lake Superior

      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      The wonders of the Ice Caves of the Apostle Islands National Lakeshore, Feb. 2, 2014.  

      Credit: Brian Peterson/Star Tribune/AP

    • Ice caves of Lake Superior

      Winter access to the caves is only possible when the ice is thick enough to safely walk on.


      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      A visitor photographs the ice caves of the Apostle Islands National Lakeshore, Feb. 2, 2014.  

      Credit: Brian Peterson/Star Tribune/AP

    • Ice caves of Lake Superior

      It's the first time in five years that conditions have been right for viewing the ice caves, and some fear the unusual event could become even rarer.

      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      The wonders of the Ice Caves of the Apostle Islands National Lakeshore, Feb. 2, 2014.  

      Credit: Brian Peterson/Star Tribune/AP

    • Ice caves of Lake Superior

      Although it's been a brutal winter, a study of the Great Lakes ice pack found that over 30 years it decreased by 70 percent.


      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      Unusual formations hang from the ceiling of an ice cave of the Apostle Islands National Lakeshore, Feb. 2, 2014.  

      Credit: Brian Peterson/Star Tribune/AP

    • Ice caves of Lake Superior

      Park superintendent Bob Krumenaker points to climate change as the reason behind why the ice caves could become a rare event.


      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      "We're referring to the ice cave experience as a truly endangered national park experience, because, like endangered animals, we can't predict its future, and it may not always be there," says park Superintendent Bob Krumenaker.

      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      Thousands of people have made the trip across the ice to visit the caves along an isolated stretch of coastline on Lake Superior.

      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      While the winter weather has created havoc elsewhere, it has also created these amazing works of art.


      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      The one-billion-year-old sandstone is full of cracks, allowing for lake water to seep in and cover it in ice.

      Credit: Tom Aviles/CBS

    • Ice caves of Lake Superior

      While many are complaining about the ice this winter, others are embracing it -- and seeing the beauty in it.

      Credit: Tom Aviles/CBS