[Construction of the New York World's Fair site, with the steel frames of the Trylon and Perisphere in the background.]
[Construction of the Helicline, Trylon and Perisphere, New York World's Fair site.]
[Construction of the Perisphere and Trylon, New York World's Fair site.]
[Construction of the Trylon and Perisphere at the New York World's Fair site.]
[Construction of the New York World's Fair site, with the frames of the Trylon and Perisphere in the background.]
[Construction of the Trylon at the New York World's Fair site.]
[New York World's Fair. Pile driver with Perisphere and Trylon in background. Construction view.]
[New York World's Fair site under construction, with the frames of the Trylon and Perisphere in the background.]
[Construction of Electrical Products building with frame of Trylon in background, New York World's Fair site.]
[Trylon under construction, New York World's Fair site.]
[Construction of the Trylon and Perisphere, New York World's Fair site.]
[Construction of the New York World's Fair site.]
[Construction of the Perisphere, New York World's Fair site.]
[New York World's Fair site under construction, showing the Electrical Products building and the frame of the Trylon.]