Photos by John Sullivan; opyright 2000.
The three-part bronze sculpture "Knot" (1985) by Ju Ming (Chinese, born 1938) is on extended loan from the artist to Williams College,

and some (nonstructural!) pillars on the art museum's building.

The nearby museum Mass MoCA has six tress growing upside down outside,

and a large "Uberorgan" inside,

all part of the exhibit "Unnatural Science".