A woman who was out walking her dogs at the Sleeping Bear Dunes national park in northern Michigan snapped photos of giant ice boulders that washed ashore. Leda Olmstead said, "I thought it was the coolest thing ever especially since I've never seen anything like it. I have a small English bulldog and they were as tall as her. They were pretty massive." She said the ice boulders lined the coast for about 100 feet. Officials estimate each ball to weigh about 75 pounds, and belive they came from chunks of ice that were floating in Lake Michigan but were shaped into spheres by wind and waves. Olmstead told The Weather Channel, "Most of the people who've lived here their whole live said they've never seen anything like it either. So it's really cool."