Plywood, painted black
16 × 22 × 22 ft. (487.7 × 670.6 × 670.6 cm)
Sonsbeek 71: Sonsbeek buiten de perken, Park Sonsbeek, Arnhem, Netherlands, 1971
Wood model, painted
Wood model, painted black and green
26 × 23 × 23 in. (66 × 58.4 × 58.4 cm)
Graphite on paper
18 7/8 × 23 7/8 in. (47.9 × 60.6 cm)