I've never seen Alfred Hitchcock's To Catch A Thief starring Cary Grant and Grace Kelly. I was shocked at how slight the actual story of a former thief trying to find the thief that's impersonating him (and thus making his life difficult). But if the actual plot is less than expected, the visual elements of the film more than make up for it. The Academy Award-winning cinematography is breathtaking especially all of the aerial shots of the French Riviera coastline and countryside. The vibrant costumes by Edith Head and the sumptuous lighting throughout are also to be commended.
The latter especially gets highlighted in the best scene of the film with Kelly seducing Grant not with her great beauty, but by the massive diamond necklace she wears. It's a fun and sexy scene cast in gorgeous green lighting and the shot below was almost my pick for best shot for the above reasons.
But I had to pick one of the film's most random visual gag which is of Cary Grant wearing a plaid bathing suit nonchalantly lying on the beach while he hides from the police.
I guess if you're known for being a thief hiding in the shadows, the last thing people expect you'd do is relaxing on the beach half-naked out in the open. You do you, Cat.