LEELANAU COUNTY, Mich. (WZZM) - Last Thursday thousands of giant ice boulders were discovered at the Sleeping Bear Dunes National Lakeshore. The photos of this rare ice event went viral and even made it on the national news.

WZZM 13went up north for a look ourselves-- and the pictures don't do justice to how many ice boulders there are.

We talked with Leda Olmsted the photographer who discovered the ice boulders. "I was just amazed, I was super excited because I had never seen anything like it," explains Olmsted.

As far as the eye could see, in a 30 to 40 foot swath, ice boulders the size of bowling balls lined the shore. "It's basically just perfectly round balls of ice scattered as far as the eye can see either way," explains Olmsted.

"I think this is a pretty unique thing. I lived up in Traverse for a couple of years. Neither of us have ever seen anything like this," says WZZM 13 meteorologist Alana Nehring.

But just how did the ice boulders form? There's a couple of different theories. The first possibility is that they started off as bigger chunks on the icebergs out in the water that got carved off by the action of the waves.

The other theory is that the ice boulders could have formed underneath the icebergs. When there are larger waves, you can see some of the bottoms of the icebergs are actually rounded.