It's a simple model — for instance, it does not account for zoning restrictions or for the fact that some cities, such as London, emerged as polycentric entities hundreds of years ago when several smaller villages consolidated — but it is still a useful model for exploring polycentricity, says Michael Batty, an urban planner at University College London, who wasn't involved in the study. (scientificamerican.com)
The Blue Mountains are a situated within a World Heritage listed wilderness and have several small villages in the area. (wanderingtrader.com)
Several small villages lie around the shoreline of Lake Atitlan, each with it's own distinct personality. (casitadelasirena.org)