The dungeon and torture sequence incorporates long shots that are actually footage of Vincent Price lifted from the Pit and the Pendulum (1961). The torture chamber art and set direction was by the same art director, Daniel Haller, and these scenes in this movie evoked his work on these such Edgar Allan Poe adaptations for Roger Corman, which also starred Vincent Price.
This was made and released quickly, coming out only about a year after the James Bond film Goldfinger (1964) was released in the US. It parodies certain elements of the Bond film, particularly its title.
At the start of the movie and again during the end chase in the streets of San Francisco they go down Lombard Street. With eight sharp bends it is known as the most crooked street in the world. The bends are so tight tour buses can't drive down it.