That isn't sand

Made my way up to Green Bay a few weeks ago.  While everyone was sleeping late on a Sunday morning, I grabbed the camera and drove the lakeshore up towards Door County.  Of course, in early January, not alot to see unless you really look forward to seeing the latest makeup of an ice shanty.  If that's the case, you would have had lots of opportunity to see the newest models.  I did find an ironic point, though.  The sign was all the warning I needed to not go for a plunge in the bay.