The Sound of Music
This one is not deceptive like the others, because the setting of The Sound of Music is actually set in Salzburg, Austria! It is approximated that 70% of the tourism that comes through this area is because of this movie. In fact, the already famous locations that were shot in The Sound of Music, like the Pegasus Fountain and the gazebo at Hellbrunn Palace, got significantly more famous after this movie came out.
Advertisement