Gerbrandy Tower
IJsselstein, near Utrecht, 1961, 366.8 meters. The Gerbrandy Tower is a hybrid you rarely see: a reinforced concrete tower about 100 meters tall carrying a guyed steel mast that makes up the rest. The photo shows the join plainly, with the guy wires fanning out from the mast above the concrete head. It is the tallest structure in the Netherlands and a key FM radio and television transmitter site for the country. It has actually shrunk over the years, from 382.5 meters when it opened, as old antennas were swapped for new ones.
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