The 62-acre (25 ha) preserve contains thirty-eight of forty-three Native American mounds located on a narrow Paleozoic Plateau at the confluence of the Mississippi and Turkey rivers.

The mounds were constructed during the Woodland period (500 BCE and 900 CE).

The preserve is also home to a variety of trees, prairie grasses and flowers.

It was dedicated as a state preserve in 1968 for its archaeological, geological, and biological qualities.

This article about a property in Clayton County, Iowa on the National Register of Historic Places is a stub.