There's a McDonald's on a riverboat permanently moored in front of the Arch. It's the only one I've seen without the golden arches. As a boy, I was told this was a condition for taking that spot: They couldn't have anything that would "compete" with the monument.

Of course, that was then. If St. Louis has gotten anything like Chicago (where Disney can line State Street with 3-D advertisements and call it "art" and the new "Milennium Park" doesn't have a square inch that isn't named for a corporation), they're working on plans for the second span as I type this.