All the films were made at Pinewood Studios near Iver Heath, Buckinghamshire. Budgetary constraints meant that a large proportion of the location filming was undertaken close to the studios in and around south Buckinghamshire, including areas of Berkshire and Middlesex. However, by the late 1960s (at the height of the series' success) more ambitious plots occasionally necessitated locations further afield, which included Snowdonia National Park, Wales (with the foot of Mount Snowdon standing in for the Khyber Pass in Carry On Up the Khyber), and the beaches of the Sussex coast doubling as Saharan sand dunes in Follow That Camel.