[Dixie Yooper]

In the last few years, the Iron County Reporter, a weekly out of Iron River,MI, published a photo of an ice circle on the Paint River during the early Spring.

[cripplecreek]

I remember the thread.

[JoeProBono]

Massive 10ft Spinning Ice Circle Discovered in the UK

[cripplecreek]

Here's one on Mud lake in Liberty Township Michigan.



If I recall correctly they form pretty much every year.