Below you will find a list of mounds which I feel are significant to American History and highly under-rated
Aztalan
This mound site is situated between Madison and Milwaukee, in Lake Mills, Wi near Rock Lake and the supposedm man-made underwater rock structures
Chucalissa
The site is located adjacent to the T. O. Fuller State Park within the city of Memphis, Tennessee. Tucked away in a place you'd never expect and encroached upon by a railway that visibly cuts through the archaeolgical site.
Cahokia
Containing over 120 man made mounds as well as the largest earthen mound in the Americas north of Mexico, this ancient metrolpolis sits between St. Louis, MO and Collinville, Il.
Check the below links to learn more about America's hidden secrets
