Where is Nickie Ferrante's grandmother's house in the movie An Affair to Remember?

Oh, dude, in the movie "An Affair to Remember," Nickie Ferrante's grandmother's house is in the French Riviera. It's like this fancy-schmancy villa overlooking the beautiful Mediterranean Sea. So, if you're ever in the mood for some glamorous scenery and a touch of old-school romance, that's the place to be.