Where: California · approx. 37.59, -122.07 (vicinity only)
Why this spot: 1880s+ Sanborn-mapped town on San Francisco Bay (Alameda Creek / salt marsh)
What turns up: 1870s-1900s sugar-refinery, salt-works and saloon bottles and Chinese-labor ceramics along the creek and marsh edge
Access: Gray area.
Bay tidelands and Alameda Creek bed below the high-water line are state public-trust land (PRC 5097.5); the old townsite (now Union City) is private, so seek permission.
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.