The Des Moines cairn and the southern of the three other stuctures which surround it, from Andy Goldsworthy's Three Cairns, at the Des Moines Art Center.
not unlike those who rely on gravity in the production of floors, the artists of "mono-ha" used gravity as an art material. in this 1968 piece by korean born Lee Ufan, gravity is as present as the concrete block and the plane of glass.
Sam Durant Partially Buried Dystopia Revealed (Mick Jagger at Altamont) & Utopia Reflected (Wavy Gravy at Woodstock), 1998 Mirrors, dirt, amplified audio system, and audio CD
Katharina Grosse - Made to been seen at high speeds, these colorful patterns intentionally form a sequential whole when experienced by commuters in adjacent railway cars.