Illinois
Alton, Madison County Mississippi River port
Riverbank Source-confirmed findsGray area
What you could find
Reported finds from this ground.
Old bottles
Sea pottery
Clay pipe stemsAlso reported: limestone quarry debris.
Photos via Wikimedia Commons: Sheila Sund (CC BY 2.0), NPS (Public domain), Surrey County Council, David Williams, (CC BY-SA 4.0).
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Why this spot
1880s+ Sanborn-mapped town on Mississippi River
Long glassmaking history makes the bluff-base dumps and old wharf blocks the strongest targets; work uplands only with permission.
Keep exploring nearby
More spots in this area.