Vertigo - Look-alike
After recovering from his melancholia Scottie drifts around town imagining every blonde he sees is Madeleine. He can't help himself from revisiting Podesta Baldocchi's flower shop, the same one she had once led him to, at 224 Grant Avenue near Union Square (map).
Then ... He can't believe what he sees - a woman in a green dress is walking towards him ... and she's a dead ringer for Madeleine (surprise - also played by Kim Novak).
... and Now, the same view today looking south from in front of 224 Grant is remarkably similar although not surprisingly the building across the street on the corner of Post Street no longer houses the Rexall's Owl Pharmacy.
Then ... She pauses with her friends in front of Scottie. He probably didn't notice that her dress matched those two Podesta Baldocchi vehicles, an example of Hitchcock's detailed attention to color.
... and Now, the alley across the street is Campton Place. Shreve and Co. the jewelers occupied the building to the left back then and still does today.
Then ... As she continues on along Grant Scottie finds himself drawn in once again, unable to resist the urge to follow her.
... and Now, the view today has hardly changed, well ... vehicles excepted.