Taken from Niagara Square, Buffalo City Hall (1929-1932) sits behind the McKinley Monument (1907) which was built to recognize the late President who was assassinated in Buffalo during the Pan American Exposition of 1901. Did you know that there's an observation deck on the 28th floor that provides an unobstructed 360 degree view of the city? (It's open Monday thru Friday 8-4 p.m.)