Official websites use .gov
A .gov website belongs to an official government
organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to
the .gov website. Share sensitive information only on official,
secure websites.
U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
This group of byway visitors laugh as they climb the stairs to Cahokia Mounds, the remains of the most sophisticated prehistoric native civilization north of Mexico.
Public Domain.
Download Original (1551 x 1039 pixels, 1017.6 MB)
