Twixt Morse and Farwell on southbound Glenwood Avenue in Chicago, the CTA retaining wall was decorated with a mural derived from “underground” comix of the late 1960s and early 1970s. (See for example the 1971 album art by Dave Sheridan above.) The mural was done in 1993. The photos below were taken in the autumn of 2000. By that time, the patina of seven years of Chicago weather and pollution made the mural look almost appropriately aged.