Washington Dulles (IAD) is a stunning airport. Like a great work of art, it’s beautiful. Its structure is carefully considered, its form evokes emotion, and it’s fundamentally flawed. Dulles was the last significant design from legendary architect Eero Saarinen. Saarinen’s uncompromising vision and eye for detail is clear in the main terminal’s spectacular roof. Massive glass curtain walls and kiosk-mounted amenities allow the roof to ascend as a single, unblemished curve without lights, speakers, or sprinklers. Thanks to an efficient underground security system, there are no lines on the main floor and the structure buzzes with movement. A gorgeous underground rail system between terminals was built a few years ago, finally relegating the once cripplingly slow mobile lounge buses to a comedic footnote. Despite all this, IAD will never reach the status of America’s great airports. IAD is some 30 miles away from the city it serves, and relies on a spotty system of buses. This limits IAD’s traffic to international flights and the few passengers who value IAD’s beauty over DCA’s convenience. Nevertheless, IAD is the only midcentury American airport that still truly functions after nearly six decades of operation. LAX’s Theme Building and JFK’s Pan AmWorldport and TWA Flight Center are either inoperative or razed. And yet IAD’s cantilevered roof continues to soar, as it will for decades to come.