abstract:Time Transfixed (La Durée poignardée, 1938) is an oil on canvas painting by the Belgian surrealist René Magritte. It is part of the permanent collection of the Art Institute of Chicago and is usually on display in the museum's new Modern Wing.
You will have your own favourites, but I always liked the Traffic Light Tree in London's Docklands, a bewildering display of red, amber and green which kept me waiting, transfixed and tense, for really quite some time when I first encountered it.