AC 65

Alexander Calder's Triangles and Arches is a familiar sight in the southernmost of the reflecting pools on the Empire State Plaza (and rather in need of a fresh coat of paint).  And, if you look at the just the right angle, you can see the artist's initials on one of the massive black panels.

Salem 7, 1/3

Salem 7 1/3, a sculpture by Antoni Milkowski, stands like a modern monolith near the eastern overlook on the main platform of the Empire State Plaza.

Geometry On The Plaza

Two massive intertwined metal cubes on the Empire State Plaza. This modern sculpture is Untitled, 1969-70 by Forrest Myers.