At the corner of Prospect Avenue and Terrace Place in Park Slope, Brooklyn last December, Y and I saw this passageway opened to an underground passage way. I didn’t look closely at the raised metal cover, so I’m not sure if it was ConEdison, MTA, or another utility. No workers were around, so they didn’t offer a clue either. Looking below inside, the walls of the passageway were covered with spray painted graffiti.
