7. The Helmsley Building is Also a Gateway to Midtown

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The Park Avenue/Pershing Square Viaduct was built in ten years prior to The New York Central Building (Helmsley Building) as a way to link upper and lower Park Avenue. Also designed by Warren and Wetmore, the elevated driveways wrap around Grand Central Terminal then descend to street level at 46th Street. Traffic enters and exits through the building via the portals. The viaduct itself was landmarked in 1980.