A Modern Under

Located 30 minutes to the northeast of Tokyo by train, in Kasukabe City, Saitama Prefecture, is a facility that resembles a huge underground Parthenon. This 6.3 kilometer long drainage conduit, built for flood control, cost a total of 230 billion yen ($2.875 billion) and took 13 years to construct. It was completed in 2006. Its function is to drain water from a river before it overflows its banks and transfer the water underground to another river.
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