This original postcard is from the 1933 Century Of Progress (Chicago World's Fair) which was held in Chicago. It is in good condition and the front features the "Shedd Aquarium". The reverse side features a postcard format, which is unused and a paragraph that says "The John G. Shedd Aquarium is located in Grant Park adjoining A Century of Progress. Hundreds of thousands of visitors have already marveled at the specimens of rare fresh & salt water fish gathered from all parts of the world" and measures approx. 5 1/2" x 3 1/2".