The Godfather
This was filmed in a variety of places over the USA and in Italy. These are a few of the buidings used in the film.

The casino business: Tropicana, Las Vegas Boulevard, Las Vegas, Nevada

New York County Courthouse, Center Street, Lower Manhattan, New York

Old St Patrick's Cathedral, Mulberry Street, Little Italy, New York
Psycho
The filming location for thriller film Psycho may not look like it, but a majority of it was filmed at the Revue Studios, the television branch of Universal Studios rented for Alfred Hitchcock by Paramount.

The Bates house: Universal Studios, Studio City, Los Angeles.

Marion and Sam at the Jefferson Hotel: Barrister Place Building, South Central Avenue, Phoenix, Arizona.

Marion trades in her car: Century West BMW, Lankershim Boulevard, Los Angeles.