Utopia: are sites with no real place. They present society itself in a perfected form.
Heterotopia: is capable of juxtaposing in a single real place several spaces, several sites that are in themselves incompatible. Thus it is that the theater brings onto the rectangle of the stage, pne after the other, a whoel series of places that are foreign to one another;
-Michel Foucault 'Of Other Spaces'