This is the upper section of El Capitan.  Thanksgiving Ledge is the obvious horizontal ledge in the top third of the picture.  Wings of Steel joins Aquarian Wall after 13 pitches, then ascends Aquarian Wall to Thanksgiving Ledge.  From there, you traverse the ledge to the left until you reach the West Buttress exit (the lower-angled, rounded shoulder, visible in the upper-left of the picture).