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U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
In the distance, the grass covered Monks Mound rises up from the flat surrounding area at Cahokia Mounds State Historic Site.
Public Domain. Photo by Lyle Kruger
Download Original (3498 x 2383 pixels, 1907.3 MB)
