Question: What popular tourist destination was built in the 1960's in the city that had the Pruitt-Igoe complex?
Sentence (from "Gateway Arch"): Built as a monument to the westward expansion of the United States, and officially dedicated to "the American people," it is the centerpiece of the Jefferson National Expansion Memorial and has become an internationally recognized symbol of St. Louis, as well as a popular tourist destination.
Relevant evidence: Yes