The PanAm Worldport, a terminal at JFK (built when it was still Idlewild, at the dawn of the jet age). Sadly, it’s being demolished:
The plan would entail the demolition of the smaller terminal, the PanAm Worldport, an architectural symbol of the 1960s jet age that has nevertheless been described as a blight on the airport by passengers and airline executives alike.
Delta has long lamented the state of the Worldport, which it uses for many of its international flights, describing the space as unpleasant and unfit for its role as a gateway to the United States for international travelers.
(via, indirectly via)