Folly Brook
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The Folly Brook is a stream in the London Borough of Barnet and is a tributary of the Dollis Brook.
Folly Brook rises on Highwood Hill, Mill Hill, and flows through a place known as Darlands, which has been dammed to form a decorative lake and a nature reserve. (Urgent remedial work will be done on the lake in 2006 to reduce the risk of flooding.) The Folly marks the boundary between the ancient parish of Hendon to the south, and that of Totteridge, until 1965 in Hertfordshire, to the north. The Folly flows eastward to meet the Dollis Brook not far from Woodside Park tube station.