The Gateway Arch, the signature architectural masterpiece of St. Louis and the icon of the Westward Expansion of the United States, is even more emblematic as a symbol of the city’s resurgence. Fresh off the $380 million CityArchRiver project that made massive improvements to the Gateway Arch National Park surrounding the Arch, the re-do added a wealth of impressive event options and remedied a critical design flaw that cut off pedestrian access to the park from downtown by a busy six-lane highway.