"I think there is something in the Italian landscape which inclines even the most stolid to romance." says a character at one point. From there it's easy to notice the similarity with Call Me by Your Name, written by the writer/director of A Room with a View. The other reference that comes to mind is Titanic, since the young Lucy is in a similar situation than Rose, with the exception that the rich party she's set to marry is not an awful human being but simply a snob.
A Room with a View