Is symmetry important to you? Originally planned in 1919 to commemorate those who fought in World War One, Indianapolis's War Memorial Plaza is a beautiful open-air space for those who appreciate classically-inspired architecture. It was planned on a simple axis with smaller areas to commemorate successive wars. The buildings that surround it like the American Legion, Public Library, and War Memorial, are each inspired from Classical ideals and sate the desire for symmetry.
Go any time of year. This type of architecture does not need warm weather or even good light to be appreciated.