.

CTA cross junction, northwest corner of The Loop, Chicago; control tower 18 guides north and southbound Purple and Brown lines intersecting with east and westbound Pink and Green lines and looping Orange line above the Wells/Lake Street intersection (edit 4): photo by Daniel Schwen, 2007

Green line train approaching Randolph/Wabash station, northwest corner of the Loop: photo by Daniel Schwen, 2007

A Brown line train and an Orange line train contend for the intersection at the southwest corner of The Loop, Chicago (taken from crossover walkway of Adams/Wabash stop on the Green, Orange, Brown and Purple lines): photo by Kelly Martin, 2005

leaving downtown: photo by tripp, 2006

Turning Left on Van Buren: photo by Alfie Martin, 2006

blueloop: photo by Sam D., 2008

Northward view from the Adams/Wabash station at night: photo by Daniel Schwen, 2009