Grendon Underwood is a village and civil parish in west Buckinghamshire, England, near the border with Oxfordshire.

The village sits between Woodham and Edgcott, near the Roman road Akeman Street (now part of the A41), and around 10 miles (16 km) north-west of Aylesbury.

When Roald returned home from Royal Air Force duty in Greece and Palestine in the autumn of 1941, he at first had no idea where to find his family.

Both woods are now silvicultural and classified as ancient forest and are sites of special scientific interest (SSSI's).

This offers protected status to some of the endangered species of animals residing therein such as Bechstein's bats, and nightingales.

HMP Grendon opened in 1962 as an experimental prison for inmates with psychiatric antisocial personality disorder.

[10] This a Biennial event (every 2 years), with live music, comedians and a CAMRA supported real ale festival.