Cook County, Illinois
Octagon house - IL-16-01 Round barn - IL-16-04 Octagon bldg - IL-16-06 Octagon bldg - IL-16-07 Octagon church - IL-16-08 Round bldg - IL-16-09 Round barn - IL-16-10 Round bldg - IL-16-11 Round bldg - IL-16-12 Round bldg - IL-16-13 Round bldg - IL-16-14 Octagon church - IL-16-15 Round church - IL-16-16 Round bldg - IL-16-17 Round bldg - IL-16-18 Covered bridge - 13-16-A Covered bridge - 13-16-B Covered bridge - 13-16-c Covered bridge - 13-16-D Covered bridge - 13-16-e