Location #1: Opening scene
In front of 7529 Franklin Avenue, Los Angeles, California, United States
Location #2: Police station
This is a studio backlot / movie set
Location #3: Jim’s house
This is a studio backlot / movie set
Location #4: Dawson High School
Santa Monica High School, 601 Pico Boulevard, Santa Monica, California, United States
Location #5: Planetarium
Griffith Observatory, 2800 East Observatory Avenue, Los Angeles, California, United States
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There’s a couple of good web posts on “the mansion” at Wilshire and Irving here:
http://forum.skyscraperpage.com/showpost.php?p=5241376&postcount=3552
http://forum.skyscraperpage.com/showpost.php?p=5241116&postcount=3551
The home was also used in “Sunset Boulevard” and “Fancy Pants”
Where did they film the toilet/curry scene?
More on the “haunted mansion”–aka the Jenkins/Getty/Desmond house–here: https://wilshireboulevardhouses.blogspot.com/2013/02/641-south-irving-boulevard-please-see.html