[click image to enlarge]
Quincy has its own ruins documented here. This is the site of the Lyon's Turning Mill, the largest granite turning mill in America, founded in 1894, where monolithic columns (one piece of rock) were turned for many famous buildings including the Custom Houses in Boston. I like the column remnant in the foreground.
There is a preservation move to turn the remnants of this into a museum about the granite industry in Quincy. Click here for more information about the museum effort. These ruins are fenced in on the edge of the Blue Hills and Granite Links Golf Course and it is listed on the National Register of Historic Places.