Unique Cairn in Massachusetts Has Michigan Twin
Here is the unique cairn from Massachusetts:
This cairn is hollow in the middle:
To give this a bit more context, the unique cairn is located in the vicinity of this stone deity (as well as other cairns):
Ok, and here is a similar cairn (photo on the left) from Michigan State, compared to the first 2 pics from Massachusetts. It is the same style and design elements, although I can't tell about the height from the photograph. The article compares it to this larger cairn at the bottom of a lake in Wisconsin:
Thank you to Valdamir Samuelsson, Tim MacSweeney & Peter Waksman for sharing this magazine clipping.