Two things that I saw that I really did like were
(1) a really delightful drawing by architect Daniel Libeskind. It was dense and complicated, and appeared to be a sort of architectural rendering of something. Full of isometrically-rendered right angles (which is to say, you were tempted to read as being right angles in three-dimensional space) and rhythmic repetition of planes and dowel-like excrecences, and tubes stretching through them... but if you looked more closely, you saw escheresque impossibilities hiding between lines, spaces shimmering ambivalently between being figure and ground.
(2) The score of La Monte Young's "Piano Piece for David Tudor ＃1":
Bring a bale of hay and a bucket of water onto the stage for the piano to eat and drink. The performer may then feed the piano or leave it to eat by itself. If the former, the piece is over when the piano has been fed. If the latter, it is over after the piano eats or decides not to.
eta: found an image of (1): "Micromegas Project, Time Sections"