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California

Alameda

Crown Beach / Neptune era (look only)

Tidal foreshore Inferred from historyProhibited, look only

What you could find

Reported finds from this shoreline.

Sea potterySea pottery

Also reported: (observe only).

Photos via Wikimedia Commons: NPS (Public domain).

Why this spot

1880-1935

Persistent bottle-and-beach-glass lore; no verifiable dig documentation.

Keep exploring nearby

More spots in this area.

Check access and collecting rules for each site.