The River Misbourne rises in a field on the outskirts of Great Missenden in Buckinghamshire, passing through Little Missenden, Old Amersham, Chalfont St Giles, Chalfont St Peter and under the Chiltern railway line and the M25 motorway to its confluence with the River Colne just north of where the Colne is crossed by Western Avenue, the A40 road. It falls by around 94 m (310 ft) in the course of its 27 km (17 mi) length.
River Misbourne near Chalfont St Giles
River Misbourne was diverted via culverts under M25 motorway. This is the downstream portal of the culvert. The railway viaduct is visible over the trees in the background.
Great Missenden is an affluent village and civil parish in the Misbourne Valley in the Chiltern Hills in Buckinghamshire, England, situated between the towns of Amersham and Wendover. It adjoins the village of Little Kingshill, and is a mile from Little Missenden and the village of Prestwood.
Church of St Peter and St Paul, Great Missenden
The Roald Dahl Museum and Story Centre, located at 81–83 High Street, Great Missenden