Nestled next to Pleasantville, NY, Usonia (or Usonia Homes) is a subdivision designed by Frank Lloyd Wright. Approximately 44 homes were built in the late 40s and early 50s by young, middle-class New Yorkers according to the principles of Wright's ideas for planning cities and neighborhoods and for housing Americans (He coined the term "Usonian" as an alternative to American.). He personally designed three of the houses and approved the design of the remainder, most of which were designed by his interns or apprentices.
The Center for Architecture Foundation has organized a tour of the Usonian Homes to take place this Saturday, but it's already sold-out. In lieu of actually visiting, peruse this excellent collection of photos of the houses by Daniel Langer.