On its west, the park is bounded by Main Street and to its east lies the Rock River.

[2] Mounds are the most visible evidence of cultures that lived for hundreds of years in the mix of biomes in northern Illinois.

in the Upper Mississippi River Valley in parts of Iowa, Illinois, Wisconsin and Minnesota.

When Sears now the home of Rockford Art Museum constructed a parking lot on North Main Street in the mid-1950s one of the conical mounds was destroyed.

A bird effigy was destroyed when the North Main Manor apartment building was under construction across Park Avenue from the mounds.