The neighborhood around Cleveland Museum of Art, Case Western Reserve University, the Cleveland Institute of Music, and the Cleveland Museum of Natural History is known as University Circle. For a long time, perhaps longer than I should admit, I thought that the circle the name referred to was the one made by Wade Oval, the road that runs in front of the art and natural history museums, and the Cleveland Botanical Gardens. There was a certain logic to this - after all, it is the only reasonably circular road in the University Circle area.
Alas, this was not true. University Circle, which eventually gave name to the whole neighborhood, was a traffic circle, located at approximately Euclid Avenue and Stearns Road.
This plate, from the 1898 Atlas of the city of Cleveland, Ohio illustrates the University Circle area. The actual circle can be seen just to the right of center.
The circle lasted at least into the 1950s. As roads were realigned, the circle was eliminated.
This map is just one of the many great research sources available online thanks to the Cleveland Public Library maps collection.