Renderings by a little-known interior designer, Frank Botello, imagine sinuous pathways that hug the building facades and appear to run the entire length of the canyon, from Wacker Drive on the north to Jackson Street on the south. Pedestrians would climb stairs at the LaSalle-Wacker intersection to an over-the-street platform that leads to the walkway. In some spots, the walkway would cover the street, shutting off views of the iconic Chicago Board of Trade Building from street level.