New York's buried streams have company. London's River Fleet, the city's largest subterranean waterway, was bricked over in stages between the 1730s and 1870s, each stretch converted to road or sewer. The streets that replaced it kept the memory: Fleet Street, Farringdon Road, New Bridge Street. The Great Northern Hotel at King's Cross physically curves to follow the old riverbank.
Camden's flood risk strategy still identifies those same streets as primary overflow routes when the Fleet sewer surcharges. Same path. Same water. London has roughly 25 buried rivers running beneath it, most absent from standard flood maps. Every one of them still tells water where to go.