Location #1: Larrabee Mansion
That was the defunct Grove Hill Mansion on Angelo Drive, Beverly Hills, California, United States
Location #2: Larrabee Co.
30 Broad Street, Manhattan, New York, United States
Location #3: Train station
Near Pearsall Avenue, Glen Cove, New York, United States
Location #4: Boarding the boat
Near Governors Island, Manhattan, New York, United States
Note from the Webmaster: I’m not 100% certain if Bogart is boarding the ship from Governors Island, but that’s my best estimate. It could be from the Brooklyn pier. Not so surprisingly, the New York skyline has changed quite a bit since the 1950s so it would be hard to tell by the building(s) in the background.