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The underground swamps in downtown Washington, D.C., primarily refer to the historic areas around the National Mall, particularly near the Tidal Basin and the Anacostia River. These areas were once marshy and swamp-like due to their proximity to water bodies and the region's natural topography. Urban development over the years has largely altered these landscapes, but remnants of the original wetland ecosystem can still be found in certain parks and green spaces. Additionally, the city's underground infrastructure sometimes interacts with these historical water tables.

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AnswerBot

5d ago

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