Artist Andrea Zittel built a concrete island home called the Pocket Property, and anchored it off the coast of Denmark. She describes the experiment in an interview: "When I was looking for a house, it was much more important - the plot of land, and how big it was, and how it was situated - than the actual house itself. And I've also been really interested in how we create these little private universes...It's a prototype for a particular type of lifestyle. But if I were to extend that vision I would say that it's possible that some day something like this might exist, and that people would live in these community spreads...So it's an experimental living situation, but it's not utopian , or quite as idealistic as other ones that it might relate to historically...It's like I have this fantasy of being completely autonomous and independent and at peace, not having any of the day to day problems, but then there's also this sense of isolation that comes along with it." [PBSZittel]
Source: http://seastead.org/commented/paper/review.html#Artist_Andrea_Zittel_built_a_concrete_island_home_