(For other uses, see Walbrook (disambiguation).) Walbrook is a subterranean river in the City of London that gave its name to a City ward and a minor street in its vicinity. The ward of Walbrook contains two of the City's most notable landmarks: the Bank of England and Mansion House. The street runs between Cannon Street and Bank junction, though vehicular traffic can only access it via Bucklersbury, a nearby side-road off Queen Victoria Street.