Lake Superior's dazzling ice caves
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.
Ice caves of Lake Superior
Ice caves of Lake Superior
Winter access to the caves is only possible when the ice is thick enough to safely walk on.
Ice caves of Lake Superior
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.
Ice caves of Lake Superior
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.
Ice caves of Lake Superior
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.
Ice caves of Lake Superior
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.
Ice caves of Lake Superior
While the winter weather has created havoc elsewhere, it has also created these amazing works of art.
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.
Ice caves of Lake Superior
While many are complaining about the ice this winter, others are embracing it -- and seeing the beauty in it.