The Rosenberg Fountain at S Michigan and 11th in Grant Park, as it appeared in 1923.
It still stands. It was bequested by Joseph Rosenberg (1848-1891), who as a child newsie in Chicago could never convince anyone to give him a drink of water. Rosenberg vowed should he ever become wealthy, he would provide a place for the thirsty to drink. It was erected in 1893.
Buckingham Fountain, 1935, Chicago.
I love that you can see the Palmolive Building (far right) in this shot.