Wacker Drive is an "L" shaped street. As a result, it has addresses in all four quadrants of Chicago--North, South, East, and West. It is the only such street in Chicago. Also there's a lower level to Wacker Drive.
340 N. at 400 E. to 200 N. at 340 W. and 360 W. from 188 N. to 424 S.
200 South Block