This original postcard is from the 1933 Century Of Progress (Chicago World's Fair) which was held in Chicago. It is in very good condition and the front features the "Sky Ride". The reverse side features a postcard format, which is unused and a paragraph that says "One of the most interesting features of Chicago's World Fair is the Sky Ride. The towers are 600 feet high. Double decked rocket cars will run suspended from 4 cable tracks between & around the two towers" and measures approx. 5 1/2" x 3 1/2".