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The Des Moines Hearst-Argyle TV Tower is a mast used as a broadcast antenna and it is 2000 ft (609.6 m) tall. It was built in 1974 in the US. Its among the tallest man-made structures to exist along with a number of other tall masts and the Petronius Platform, a mostly submerged oil platform.
See also: List of masts, List of towers
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