In the Labyrinth
It was hailed as a "stunning visual display" by Time magazine, which concludes: "such visual delights as Labyrinth ... suggest that cinema—the most typical of 20th century arts—has just begun to explore its boundaries and possibilities." 
In the Labyrinth was co-directed by Roman Kroitor, Colin Low and Hugh O'Connor and produced by the National Film Board of Canada. Kroitor left the NFB shortly after to co-found Multi-Screen Corporation, which later became IMAX Corporation.
In 1979, the NFB re-issued In the Labyrinth in a single-screen format.  In May of 2007, the NFB and the Cinémathèque québécoise presented an exhibition on the Labyrinth pavilion, marking the 40th anniversary of Expo 67.