Of Other Spaces: Utopias and Heterotopias. About Trains

 
Of course one might attempt to describe these different sites by looking for the set of relations by which a given site can be defined. For example, describing the set of relations that define the sites of transportation, streets, trains (a train is an extraordinary bundle of relations because it is something through which one goes, it is also something by means of which one can go from one point to another, and then it is also something that goes by)

Of Other Spaces: Utopias and Heterotopias
Michel Foucault