From about 200 BC to AD 500, the Ohio River Valley was a central area of the prehistoric Hopewell culture.
The term Hopewell (taken from the land owner who owned the land where one of the mound complexes was located) culture is applied to a broad network of beliefs and practices among different Native American peoples who inhabited a large portion of eastern North America.
 The culture is characterized by its construction of enclosures made of earthen walls, often built in geometric patterns, and mounds of various shapes.
 Visible remnants of Hopewell culture are concentrated in the Scioto River valley near present-day Chillicothe, Ohio.

The most striking Hopewell sites contain earthworks in the form of squares, circles, and other geometric shapes.
 Many of these sites were built to a monumental scale, with earthen walls up to 12 feet (3.7 m) high outlining geometric figures more than 1,000 feet (300 m) across.
Conical and loaf-shaped earthen mounds up to 30 feet (9.1 m) high are often found in association with the geometric earthworks.
 The people who built them had a detailed knowledge of the local soils, and they combined different types to provide the most stability to the works.
 It required the organized labor of thousands of man hours, as people carried the earth in handwoven baskets.

Mound City, located on Ohio Highway 104 approximately 4 miles (6.4 km) north of Chillicothe along the Scioto River, is a group of 23 earthen mounds constructed by the Hopewell culture.
Each mound within the group covered the remains of a charnel house.
 After the Hopewell people cremated the dead, they burned the charnel house.
 They constructed a mound over the remains.
 They also placed artifacts, such as copper figures, mica, projectile points, shells, and pipes in the mounds.
From about 200 BC to AD 500, the Ohio River Valley was a central area of the prehistoric Hopewell culture. The term Hopewell (taken from the land owner who owned the land where one of the mound complexes was located) culture is applied to a broad network of beliefs and practices among different Native American peoples who inhabited a large portion of eastern North America.  The culture is characterized by its construction of enclosures made of earthen walls, often built in geometric patterns, and mounds of various shapes.  Visible remnants of Hopewell culture are concentrated in the Scioto River valley near present-day Chillicothe, Ohio.
The most striking Hopewell sites contain earthworks in the form of squares, circles, and other geometric shapes.  Many of these sites were built to a monumental scale, with earthen walls up to 12 feet (3.7 m) high outlining geometric figures more than 1,000 feet (300 m) across. Conical and loaf-shaped earthen mounds up to 30 feet (9.1 m) high are often found in association with the geometric earthworks.  The people who built them had a detailed knowledge of the local soils, and they combined different types to provide the most stability to the works.  It required the organized labor of thousands of man hours, as people carried the earth in handwoven baskets.
Mound City, located on Ohio Highway 104 approximately 4 miles (6.4 km) north of Chillicothe along the Scioto River, is a group of 23 earthen mounds constructed by the Hopewell culture. Each mound within the group covered the remains of a charnel house.  After the Hopewell people cremated the dead, they burned the charnel house.  They constructed a mound over the remains.  They also placed artifacts, such as copper figures, mica, projectile points, shells, and pipes in the mounds.
Hopewell Culture National Historical Park