#ce 700

To the east of what is now the United States, between the years 1000 B.C.E. to C.E.1500, mounds were constructed by Native Americans. 

Archaeologists recognize two mound traditions among the Native American cultures:

Woodland Mounds

The Woodland mounds started as small burial mounds that eventually developed into elaborate tombs. Pictures below are the mounds of the Hopewell culture. Located in southern Ohio, these are the largest mounds. Sadly, some of the mounds have been recreated due to excavations.

"The term Hopewell describes a broad network of economic, political, and spiritual beliefs and practices among different Native American groups. That culture is characterized by the construction of enclosures made of earthen walls, often built in geometric patterns and mounds of various shapes. The culture is known for a network of contacts with other groups, stretching from the Atlantic coast to the Rocky Mountains. This expansive network brought materials such as mica, shark's teeth, obsidian, copper, and shells to Ohio."

http://www.touring-ohio.com/southwest/chillicothe/hopewell-indian-mounds.html

Mississippian Mounds

The Mississippian mounds reflect the development of farming in Native American culture. These mounds were used as bases for important structures (C.E. 700). Below is an aerial photo of the Cahokia Mounds in Illinois. They are truly beautiful and amazing.