Map taken from: Lock,G and Ralston I. 2017, Atlas of Hillforts of Britian and Ireland. [Online] Available at

There are 4 recorded Hill Forts in this area shown as orange dots on the map.

Waulud’s BankBottom Left (In Luton)
Sharpenhoe ClappersMiddle Left
Ravensburgh CastleTo the Right of Sharpenhoe Clappers (just left of Center)
Wilbury HillRight Top On outskirts of Letchworth
Hill Forts in Northern Chilterns