Dissatisfied with the world we live in, we have been longing since time immemorial for two opposing topoi: the peaceful garden -- a carefree paradise -- the New City -- a harmonious community. Utopia has long been sought after by urban architects since the time of Thomas More. Other fictional cities followed, some of which were brought to fruition such as Brasilia and Palmanova. Yet these cities too have turned out to be imperfect, deeply rooted in their own period. For the author, all these places, though only fictitious, have long since been built and he strolls through them in company with the architects, planners, writers and philosophers, just as Thomas More and many others once led us through their cities.