Staged to celebrate the completion of the Panama Canal, and drawing over 19 million visitors in only nine months, the Pan-Pacific International Expo rose like a literal jewel from the ashes of San Francisco's 1906 Earthquake and Fire.
A Century of Progress International Exposition was held in Chicago, Illinois from 1933 to 1934 to celebrate the city's centennial. The theme of the fair was technological innovation. Its motto was "Science Finds, Industry Applies, Man Conforms".
The 1939-40 New York World's Fair, located on the current site of Flushing Meadows-Corona Park, was one of the largest world's fairs of all time. The fair ran for two seasons and over 44 million people attended.
The Golden Gate International Exposition was held in San Francisco, California to celebrate the opening of the San Francisco-Oakland Bay Bridge and the Golden Gate Bridge. The exposition's first season ran from February 18, 1939 through October 29, 1939 and its second season was from May 25, 1940 through September 29, 1940.
The 1964/1965 New York World’s Fair, located on the current site of Flushing Meadows-Corona Park. The fair ran for two seasons and took place without sanctioning from the Bureau of International Expositions.
Expo 67 was held in Montreal, Quebec, Canada from April 27 to October 29, 1967. It was considered to be the most successful World's Fair of the 20th century, with over 50 million visitors and 62 nations participating.
I remember a similar tower from the incredibly detailed plastic model I made of this 1938 fireboat. The many brass fittings were reproduced in shiny golden plastic.
The tower on the boat had a platform for a fireman to direct the stream. The truck tower did look like it was controlled remotely.
Lots more pre war pics of NYC fireboats in action fighting ship fires available for those inclined toward the intersection of several PTU interests.
For another take on cylinders spouting water look into hydraulic mining in the Sierra Nevada. (I literally thought to myself, "That region is a gold mine of history!" and had my Sunday chuckle)
PS Take it from me. Standing on a tall tower on a rocking boat is an experience the Chinese may subtly describe as "interesting."