The Trylon and Perisphere were buildings erected for the 1939 New York World's Fair. Both words originate from Greek: "Peri" translating to "all around", "about" or "enclosing"; while "Trylon" was translated to "triangular pylon". Both buildings were later demolished and the iconic Unisphere from the 1964-65 New York World's Fair occupies the space.

In DC Comics, the Trylon and Perisphere were the headquarters of the All-Star Squadron in the Bronze Age of Comics and the Young All-Stars in the Modern Age of Comics. The robot Elektro which was also a main attraction at the 1939 New York World's Fair is seen from time to time in the comics occupying the buildings.