The Chiltern Hundreds is an ancient administrative area in Buckinghamshire, England, composed of three “hundreds” and lying partially within the Chiltern Hills. “Taking the Chiltern Hundreds” refers to one of the legal fictions used to effect resignation from the British House of Commons.
I grew up within the Hundreds (just).
A collection of villages in Buckinghamshire, England known collectively as “The Chalfonts”:
Chalfont Common, in Buckinghamshire, England
Chalfont & Latimer station, a station on the London Underground Metropolitan Line which serves The Chalfonts
Chalfont Viaduct, a railway bridge in Gerrards Cross, close to Chalfont St Peter