CHICAGO (CBS) -- A mystery lurks at the bottom of Lake Michigan—and it's not a shipwreck, although there are many of those down there too. About 14 miles off the coast of Sheboygan, Wisconsin, and ...
Researchers found roughly 40 depressions on the lake bed of Lake Michigan within the Wisconsin Shipwreck Coast National Marine Sanctuary. Wisconsin Shipwreck Coast National Marine Sanctuary / Facebook ...
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