Forget Macy’s and the Empire State Building and take a closer look at this fabled midtown thoroughfare, including “stops” at overlooked stores, hotels, religious buildings, and jazz age skyscrapers. Led by Matt Postal, you’ll view “The Monolith,” New York City’s first reinforced concrete building, as well as impressive structures associated with theater impresario Oscar Hammerstein and master Art Deco metalworker Edgar Brandt.