From diverse sources, J.D. Singer has drawn together a fascinating compendium of large stone forts and walled structures west of the Alleghenys. From Ohio, Indiana, Wisconsin, and all across the Midwest come descriptions of stone structures of almost heroic proportions:
A wall 5 to 12 feet high and almost a mile long at Fort Hill, Ohio;
Two big walls at Fourteen Mile Creek, Indiana;
Two massive stone walls or pyramids under Rock Lake, Wisconsin; and many more.
http://www.science-frontiers.com/sf008/sf008p01.htm
Ignorance surrounds these structures. Who built them and when? Some are likely forts, for they are paralleled by ditches. Others seem to have no defensive value. The Moundbuilders may have hand a hand in some. Madoc and his wandering Welshmen are blamed for at least one wall!
A wall 5 to 12 feet high and almost a mile long at Fort Hill, Ohio;
Two big walls at Fourteen Mile Creek, Indiana;
Two massive stone walls or pyramids under Rock Lake, Wisconsin; and many more.
http://www.science-frontiers.com/sf008/sf008p01.htm
Ignorance surrounds these structures. Who built them and when? Some are likely forts, for they are paralleled by ditches. Others seem to have no defensive value. The Moundbuilders may have hand a hand in some. Madoc and his wandering Welshmen are blamed for at least one wall!