Somewhere in Sacramento (not my area--my grandparents'), there is a small railroad museum which was once a Carnegie Library. The building was leased to a manufacturer after the library closed, and when the company moved out, the terms of the lease were that it would revert to the original owners. No longer needing a library, they turned it into a museum to the railroads that once ran through the city. In San Fransisco (getting closer to me), there is a little alley on the north side of town where there is a zig-zag line in the pavement. This line marks where the coastline used to be before they filled in the cove to expand the city. I've lived in Nor. CA all my life and I never saw that til it was on a special on PBS--it's still pretty obscure.