Found this in the sidewalk in Rockport, Mass., but posting in General because I find so little local info that I wonder if there are other examples.
(https://farm2.staticflickr.com/1558/24772586339_d11f0b202f_b.jpg)
What's the story with this? Obviously some kind of right-of-way marker, but to what end?
Essex County no longer exists other than as a line on a map, a court system, and a pension plan, so there's not really someone to ask directly.