Andy Goldsworthy's sculpture, Wood Line, stretches 1200 feet through a grove of eucalyptus trees in the Presidio, San Francisco's national park. It consists of curved eucalyptus branches, laid end to end so as to create a meandering line. At the upper end they are about three feet in diameter, and they gradually taper to about one foot at the far end.
As usual with Goldsworthy's sculptures, the place is as important as the piece. Like most of the trees in the Presidio, these eucalyptus were planted by the U. S. Army in the 1880s. In military fashion, they were planted in ranks and files to cover a hillside.
Rows of Monterey cypress trees were alternated with the eucalyptus, and over the years a peculiar thing happened in this grove. The eucalyptus grew faster and overshadowed the cypress. The cypress eventually died out, and, where they did, they left this unnaturally long, straight corridor because the trees had been planted in rows.
The place was already a remarkable example of humans leaving a mark upon the landscape when Goldsworthy chose to draw attention to it by drawing a line with eucalyptus branches.