
Cahokia Mounds State Historic Site dominates the central landscape of this Madison and St. Clair County border region, featuring world-renowned archaeological landmarks like Monks Mound and Rattlesnake Mound. The industrial and residential growth of Granite City and East St. Louis press against the oxbow waters of Horseshoe Lake, illustrating the tension between preservation and urban expansion in the late 20th century.
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1888 · St. Louis
USGS Topo · 1:62,500
1907 · Belleville
USGS Topo · 1:62,500
1927 · Alton
USGS Topo · 1:62,500
1927 · Edwardsville
USGS Topo · 1:62,500
1931 · French Village
USGS Topo · 1:24,000
1932 · Edwardsville
USGS Topo · 1:62,500
1933 · Granite City
USGS Topo · 1:24,000
1933 · Cahokia
USGS Topo · 1:24,000
1934 · Cahokia
USGS Topo · 1:24,000
1934 · Alton
USGS Topo · 1:62,500