A Hidden World Inside New York's Great Post Office

A Hidden World Inside New York's Great Post Office : NPR: "Across the street from Penn Station, in the heart of midtown Manhattan, is the enormous and imposing Farley Post Office.
Designed in 1912 by the famous architecture firm of McKim, Mead and White, the Farley building covers two square city blocks. You can still climb up its marble staircase to mail a letter, but there's very little left behind that grand facade."