The amusement park where Cassie and Val spend an afternoon was Pacific Ocean Park, elements of which still exist today as part of Southern California's Santa Monica Pier.
Pacific Ocean Park (P.O.P.) was on a pier about a mile south of the Santa Monica Pier (and Pacific Park), and they are often mistaken for each other. POP opened in 1958 to compete with Disneyland; it closed in 1967. During their long conversation, Cassie and Val are riding in a gondola 75 feet above the water; it traveled a half mile out and back.
Pacific Ocean Park (P.O.P.) was on a pier about a mile south of the Santa Monica Pier (and Pacific Park), and they are often mistaken for each other. POP opened in 1958 to compete with Disneyland; it closed in 1967. During their long conversation, Cassie and Val are riding in a gondola 75 feet above the water; it traveled a half mile out and back.
The song 'Devotion", originally composed by Max Steiner and sung by Irene Dunne in Consolation Marriage (1931), was recycled for the soundtrack of this film, along with one of the principal motifs from Die Sommerinsel (1959), utilized as the main theme in the love scenes between Connie Stevens and Dean Jones.
Some of the interior sets (particularly the hallway with the stairs and the study) are recycled from My Fair Lady (1964). The wallpaper is distinctive, as well as the lower landing on the staircase.
Partially filmed on location at Benedict Castle in Riverside, California.
William Conrad: In the amusement park in front of the wall of mirrors; when Cassie and Val stop, the Director smiles at them as he walks past.