The Marine Air Terminal ("Terminal A"), located at New York City's LaGuardia Airport, is the only active airport terminal dating from the first generation of passenger travel in the United States, a.k.a. the "Golden age of the flying boat." Originally built to handle seaplanes, the Marine Air Terminal, an Art Deco building designed in 1939 by William Delano of the firm Delano & Aldrich, consists of a central circular core of two stories with an attic, from which a rectangular entrance pavilion and two symmetrically opposed one-story wings project. In LaGuardia Airport's overall terminal naming scheme, the Marine Air Terminal is called "Terminal A".
The terminal has been listed in the National Register of Historic Places since 1982.(Wikipedia)