As we have said in the previous point, the action takes place in the Victorian World, because it wants to be a fable of it. So, the most important city of the Victorian world, with multiple layers of being (holding practically all classes of society) is London, and that's why the action takes place in it.

As can be read in Michael Sadler's Forlom Sunset (1947):
"London in the early 'sixties was still three parts jungle. Except for the residential and shopping areas... hardly a district was real]y `public' in the sense that ordinary folk went to and fro... There was no knowing what kind of a queer patch you might strike, in what blind alley you might find yourself, to what embarrassment, insult or even molestation you might be exposed. So the conventional middle-class kept to the big thoroughfares, conscious that just behind the house-fronts to either side murmured a million hidden lives, but incurious as to their kind, and hardly aware that those who lived there were also London citizens".
London was like its inhabitants, London represented that division-within-essential-unity which is the very meaning of Jekyll and Hyde. As a geographical and symbolical centre, London was "the great battlefield of mankind", as Stevenson said in New Arabian Nights.

Another point of view can be seen in Reverend William Tuckniss' introduction to Mayhew's London Labour and the Labour poor. London is described as full of vice: "the seeds of good and evil are brought to the hightest state of maturity, and virtue and vice most rapidly developed, under the forcing influences that everywhere abound (...) It is here that they (good and evil) join issue in the most deadly proximity, and struggle for the vantage-ground".

According to Tuckniss' view, London is also the great arena of moral conflict, as Stevenson also admits. London is seen as the vital centre of the Victorian World.

Stevenson uses symbolical location in the story, and, that way, the Victorian Home, or the Ideal House has an importance for the development of the novel. The Victorian Home was often a temple of domestic virtues.

The novel is set as a contrast between interior and exterior: in the exterior, crimes and social conventions, and in the interior, secret laboratories and elegant rooms, this duality represents the social cosmos.

Jekyll's house can be seen as an important metaphor because a huge part of the action takes place there. With its sinister back entrance, which is related to Hyde because he uses this entrance to get into the house; and its principal entrance, the one used by Jekyll, which gives an impression of wealth and comfort. These are the two faces of Henry Jekyll, and this paradox is continued as the plot develops.

The action leads into the interior of Jekyll's house, which represents Henry's interior.

First, the novel depicts the house, and the idea of thinking on a metaphorical interpretation is not possible here. But, then, we can see the hall, the study and, finally, the laboratory where Jekyll's experiments occur.

When Poole and Utterson break into the laboratory, because they think that Hyde has killed Jekyll, Henry's last shelter is destroyed. In that way, they force him to commit suicide because its dark secret is going to be revealed.

In this way, Dr Jekyll and Mr Hyde can be seen as a classic fable