From the beginning, St. Louis has been a city somewhat defined by it's parks. Forest Park, home of the 1904 World's Fair, stands as the second largest urban park in America behind New York's Central Park. And the Jefferson National Expansion Monument (better known to everyone as the St. Louis Arch) is surronded by park grounds taken back from the riverfront warehouse district.
But Forest Park isn't really downtown, and the Arch? That's where St. Louisians take visitors from out of town. As downtown St. Louis looks to reinvent itself as place where people actually live, it now has an actual city park - Citygarden: