»MADison and 56th

The unusual engraving on the surface of Michael Heizer's Levitated Mass show the location of the piece: 590 MADison Avenue.

A-propos: within minutes of my having posted these photographs on flickr, web search through Google had indexed them (well, the text at least). The complete set is available; I took them in part because I have not been able to uncover good, publicly-available photographs of this sculpture.