Loads of them in the past, but for more modern times: 'Titanic' with Leo and Kate Winslet. 'The Notebook' with Rachel McAdams and Ryan Gosling.
yaaa right once does the movie come from Hollywood romantic movies like titanic ... it is a very interesting movie story
For me it is "Titanic" forever. If some one has watched Titanic, you can ask that person. He/ She will definitely tell you how Romantic it was actually.