A Little Homage to Hitchcock's Vertigo?
I like L'avventura because it's so romantic. Almost a romantic thriller.
As much as Mr. Antonioni professed to be an Auteur, there was a little homage to Mr. Hitchcock's Vertigo (San Juan Bautista Mission/Church tower/bell): the scene where Claudia and Sandro are on top of the church roof with the church bells. This scene even opens with a nun leading them to on top the church roof.
And did you see the dress that Claudia wore on that church scene too? It resembles to Vertigo's Madeleine dress at San Juan Bautista Mission.
Vertigo was produced in 1958.
L'avventura was produced in 1960.
I am certain that L'avventura was partly inspired by Vertigo!