Okay, another vintage Chicago postcard that my scanner didn't want to include the border of. This one is also unsent. John G. Shedd Aquarium.
Copy from the back:
"In Grant Park at the lake front. An octagonal building of Georgia marble. Donated by John G. Shedd at a cost of $3,000,000. Exhibits ten thousand fresh and salt water fishes and other aquatic animals from all over the world. It is the largest and most modern aquarium in the world.?"
And still a fun place to visit. Allie, Celeste & I, along with my parents, visited the Shedd a few years ago. Fish are good.