Trivia: The front and back of the von Trapp house are actually two different houses. Also, the gazebo (which belongs to the house used for the back shots) is across a river from the house. You can take the Sound of Music tour in Salzburg.
Trivia: The 'whistling' heard in the background before the opening credits is that of the director Sergio Leone.
Trivia: Len Deighton, the author of the original novel, also published a series of cookery books and wrote and drew a weekly strip cartoon-style illustrated cooking guide in London's The Observer newspaper - titled 'Len Deighton's Cookstrip'. In the first kitchen scene, where Harry Palmer is making coffee, you can see one of these strips is pinned to the wooden post next to the table.
Trivia: In the beginning of the movie there is a reference to a Frenchman who had crossed the Channel by plane in the previous year (1909). The man meant is Louis Blériot, who flew from Calais to Dover in his famous craft 'Blériot XI' in 37 minutes. Again it was a competition race, for a 1000 Pounds set by the London Daily Mail.
Trivia: Robert Shaw's character is based on Kampfgruppe Jochim Peiper of 1st SS Leibstandart Adolph Hitler, Panzer Division. Peiper was a ruthless but extremely effective officer who had learnt his trade in death on the Russian front. Peiper survived the battle and the war and although he was initially sentenced to death for his part in the Malmedy massacre his sentence was commuted. He was killed in France in 1976 when his house was firebombed in a revenge attack.
Trivia: The ship used for the exterior close-up scenes was the Royal Navy frigate HMS Wizard. Some of the crew were used as extras in the film.
Trivia: The plane which is shown flying at the end of the movie was actually built and flown for the movie. The stunt pilot Paul Mantz was killed while flying it for the movie, which is why the plane is not shown landing in the movie's final scene.
Trivia: This particular biblical epic proved to be so expensive to make and did so badly at the box office, the film company went bankrupt.
Trivia: When all of the characters are together in Peter O'Toole's hotel room towards the end of the film, Peter Sellers exclaims that Ursula Andress is a "personal friend of James Bond!", in reference to her performance in the first Bond film, Dr. No (1962). This was an ad-lib by Sellers, and Andress visibly cracks up before the shot cuts away.