The final scene was filmed in the same studio set room in Los Angeles as was used for the movie Saw (2004).
The story Holly tells about Great White sharks is true. Great White Sharks usually don't survive for long in captivity- they will ram into the aquarium walls and refuse to eat.
The location at the storm culvert at 1:09:19 was used in the Lee Marvin film Point Blank (1967)
The scene of downtown Los Angeles at approximately 38:08 is from 740 Jackson Street, Los Angeles, facing the Wells Fargo Building.