Who can forget the road to the von Trapp mansion? And that gazebo! And those “Do-Re-Mi” steps!
In the exclusive clip above from the DVD extras, Andrews – who looks back on the making of the movie in the new issue of PEOPLE – reflects on how the city of Salzburg, Austria “hardly seems to have changed since director Robert Wise, his team, his cast and I arrived here.”
But the 1965 movie, which earned five Oscars, including Best Picture, changed the way of life there, attracting tourists by the thousands.
“Its success created an indelible link between the film and the city in which its story took place,” explains Andrews, 79.
Andrews revisits the gazebo where Maria and Captain Von Trapp serenaded each other in the moonlight, and the church where Maria and the captain tied the knot.
In another exclusive clip (below), Andrews reveals she had her doubts about playing Maria.
She worried the movie might be “too sentimental.”
“Think about it, children, mountains, music and nuns?” Andrews says in the DVD extras. But she trusted director Robert Wise and “by the time I arrived here in Salzburg for filming, I knew I never needed to worry again.”
Andrews also looks back at her work with Christopher Plummer, who played Capt. von Trapp.
“He brought a welcome astringency to his role,” she said.
Andrews, together with Plummer, will participate in the TCM Classic Film Festival that will run March 26 to 29 in Hollywood. The festival will kick off with a screening of The Sound of Music.
Plummer, 85, will also participate in a hand- and footprint ceremony March 27 outside the TCL Chinese Theatre.
For more from Andrews and Plummer – and amazing behind-the-scenes pictures of The Sound of Music – pick up the latest issue of PEOPLE on newsstands Friday