This year, the walk out to the ice caves in northern Wisconsin will take more effort due to extreme ice conditions. The popular attraction at Apostle Islands National Lakeshore started receiving visitors Saturday morning.
The National Park Service warns the ice is extremely slippery due to large bare areas due to lack of snow. Rangers called it "very treacherous". There are also many rough areas near the caves because of broken sheets of ice from the cliffs.
Round trip, it is at least a two mile hike for people to walk on Lake Superior. Officials advise visitors wear ice cleats on boots and carry ski poles.
The ice caves drew more than 138,000 tourists last year as the deep freeze made the caves accessible to pedestrians for the first time in nearly five years.
The park system is charging a $5 fee this year for visitors age 16 and older.
Pictures attached to this story were taken by a Fox 9 staff member last March.