An interesting blog devoted to the Foucauldian concept of heterotopia: Heterotopian Studies
„The site is devoted to Michel Foucault’s ideas on heterotopia. Foucault outlines the notion of heterotopia on three occasions between 1966-67. A talk given to a group of architects is the most well-known explanation of the term. Overall, Foucault attempts to describe certain relational principles and features of a range of cultural, institutional and discursive spaces that are somehow ‘different’: disturbing, intense, incompatible, contradictory or transforming. In a nutshell, heterotopias are worlds within worlds, mirroring and yet upsetting what is outside. Foucault provides examples: ships, cemeteries, brothels, prisons, gardens of antiquity, fairs, Turkish baths and many more.
Foucault presents a few thumb-nail sketches which he never develops into a coherent idea. And yet his tantalisingly brief words on the subject have provoked a cottage industry, producing dozens of interpretations and applications from many disciplines and professions throughout the world.
The site offers thorough on-going bibliographies, background information and resources, which are updated through my blog, a selection of personal reflections and essays and some of my own specific studies of sites related to gardens and cemeteries.“