Wikipedia
Hollingbury is an area of the city of Brighton and Hove, East Sussex. The area sits high on a hillside across the north of the city above Patcham which lies in a valley to the west, Coldean in a valley to the east, and the A27 bypass forming the northern limit. To the south it blends into leafy Surrenden and the busy Fiveways shopping area.
Hollingbury Hill itself reaches an elevation of above sea level and on the summit is Hollingbury Castle Camp, an Iron Age hill fort dating from around the sixth century B.C. It is where Triangulation Point (or Trigpoint) TP3970 used for the 1936 Ordnance Survey mapping of Great Britain is located.
The north-western slopes of the hill have been developed and are populated with housing dating from the 1940s onwards with minor retail and industrial use.