The Hackney Brook is one of the subterranean rivers of London. Rising in Holloway, it crossed the northern parts of the current London boroughs of Islington and Hackney, before emptying into the River
The eastern lake at Clissold Park, Stoke Newington, one of two that mark the original course of the Hackney Brook. It is, however, fed by mains water from the fountain seen here. (January 2006)