7. Spiro Mounds (Oklahoma)
Spiro Mounds, located in Le Flore County, Oklahoma, was a significant Mississippian ceremonial center active between 900 and 1450 AD. The 150-acre site features 12 mounds, including platform mounds for elite residences and burial mounds containing elaborate artifacts. Archaeological excavations have uncovered a wealth of ceremonial objects, shell carvings, and trade goods, highlighting Spiro’s role in an extensive trade network. Today, the Spiro Mounds Archaeological Center offers visitors interpretive trails and exhibits, providing insights into this influential prehistoric culture. (okhistory.org)
