From the baby 's bathwater to the dead rat washed down a curbside storm drain , from a slop sink at Gracie Mansion to a Washington Heights bodega bathroom , it all goes into the street sewers , which , in their intricate latticework , are laid out so that the sewage flows by gravity to one large main bound for a tunnel running under the East River to the plant on Wards Island , surrounded by Manhattan , Queens and the Bronx .
Manhattan /location/location/contains Washington Heights
Washington Heights /location/neighborhood/neighborhood_of Manhattan
Manhattan /location/location/contains Gracie Mansion
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