Many English country houses are now open to the public at various times. This film shows a few which lie near London. South of the Thames, there are Polesden Lacey, Knole of the Sackvilles, and Penshurst Place. Parts of St. John's Jerusalem, near Dartford, date back to the Crusades. North of the Thames, beyond High Wycombe, is West Wycombe Park, and to the east, in Hertfordshire, Hatfield House is only a few minutes from the Great North Road.