Gravel Pits was scheduled by the urban district council in 1905 for preservation as an open space .
Gravel Pits is an area of 14 acres ( 5.7 ha ) adjoining the golf course to the north - west in the angle of Ducks Hill and Rickmansworth roads .
Gravel Pits , an area of 14 acres ( 5.7 ha ) adjoining the golf course to the north - west in the angle of Ducks Hill and Rickmansworth roads , was scheduled by the urban district council in 1905 for preservation as an open space .