I was at Harrah's St. Louis Casino for several days, and took their shuttle to the Arch. I explored St. Louis for several hours, riding the Metrolink and visited the Fine Arts Museum, Missouri History Museum and the Westward Expansion Museum (in the "basement" of the Arch); as well as the "LOOP" district.
That these museums were free was nice.
I reside in NYC, and was very impressed with how clean the St. Louis streets were, NYC always has litter.
Who is paying to keep (most) of their museums free?