The Allan Lambert Galleria, Toronto
"The Allen Lambert Galleria, sometimes described as the "crystal cathedral of commerce", is an atrium designed by Spanish architect Santiago Calatrava. The six storey high pedestrian thoroughfare is structured by eight freestanding supports on each side of the Galleria, which branch out into parabolic shapes evoking a forest canopy or a tree-lined avenue because of the presence of building facades along the sides of the structure.
The Galleria was the result of an international competition and was incorporated into the development in order to satisfy the City of Toronto's public art requirements." (from wikipedia)