Underwater rock wall. Strange.

USA / Minnesota / Brandon /
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I know this man-made rock formation was once above water. It is too low to be a wall. Could have been some type of property marker, or pointer. I investigated this site by snorkeling many years ago. Water depth at that time was about 6-8 ft.
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Coordinates:   45°57'17"N   95°35'17"W
This article was last modified 12 years ago