Tour Of Metropolitan Area Outer Underground Discharge Channel

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Visitors walk through the surge tank area of the Metropolitan Area... News PhotoAsia,Built Structure,Dam,East Asia,Finance,Horizontal,Hydroelectric Power,Japan,Kasukabe,Saitama Prefecture,Transportation,Visit,Walking,WaterPhotographer Collection: Bloomberg 2012 BloombergVisitors walk through the surge tank area of the Metropolitan Area Outer Underground Discharge Channel in Kasukabe City, Saitama Prefecture, Japan, on Wednesday, Nov. 21, 2012. The facility called 'Underground Temple' was constructed to protect the capital Tokyo against flooding and is one of the largest underground water diversion facilities in the world. Photographer: Tomohiro Ohsumi/Bloomberg via Getty Images