Furn47 created wooden sculpture of impossible triangle. To emphasize its equilaterality, each side of the triangle is divided into six equal cubes.
You can see from another point of view that triangle has a break, and one of the outermost cubes has a shear. When you see the sculpture from right angle sheared cube combines with cube from the other side forming closed figure of impossible triangle.
Artist's Flickr photo stream http://www.flickr.com/photos/9501502@N05/