In New York, sidewalks and roads are constantly being torn up for subsurface repairs. The eventual patches are notoriously uneven in quality, and some (especially if wet concrete) are susceptible to the lure of graffiti and the chance for a name, drawing, or slogan to be there, on the ground, possibly for decades.
While walking along a stretch of 5th Avenue sidewalk the other day, I noticed a concrete repair that had been scratched into (while wet) that said “The Fire Factory”.
This term is the nickname of Engine 58 and Ladder 26, both of which are FDNY units based in East Harlem, on 5th Avenue at 114th Street. This FDNY stationhouse has been immortalized in a couple of novels/memoirs (sometimes lightly fictionalized) by Harry J. Ahearn: