Three different eras of architecture: 1920's, 60's/70's, and modern. One of the things I like about downtown Davenport is the mixture of buildings. Mississippi Plaza, the Figge, and the skybridge gave it that bit of steel and glass modernism that it needed.
Don't forget the Taste of the Quad Cities in Moline. Its not exactly a beautiful day for it, but I'm still going to try and make it over there for lunch.