Cathedrals of ice: 16 must-see photos of the Superior caves
Single digit temperatures, a chilly wind and fresh ice formations greeted visitors to the ice caves of Wisconsin's Apostle Island National Lakeshore on Thursday, March 5, 2015.
The ice caves were only open for nine days this season and the National Park Service warned of treacherous and slippery ice conditions the entire time.
Due to deteriorating ice conditions park officials closed the caves for the winter on Monday, March 9.
Gallery
Create a More Connected Minnesota
MPR News is your trusted resource for the news you need. With your support, MPR News brings accessible, courageous journalism and authentic conversation to everyone - free of paywalls and barriers. Your gift makes a difference.