Sponsored by Arts & Architecture magazine, the Case Study Houses provided post-WWII America a vision of modern living, as conceived by such luminaries as Charles and Ray Eames, Richard Neutra, and Eero Saarinen. One of just 17 originals not demolished, remodeled beyond recognition, or never built in the first place, Pierre Koenig's Case Study House #21 is an LA-area steel frame masterpiece. It measures just 1,280 square feet with two bedrooms and two baths. Yet it never feels cramped, thanks to the generous glazing, water ponds surrounding the house, and smart layout that separates the public and private areas with a core comprised of bathrooms and mechanical space. Koenig was asked by the current owners to restore the house in the late '90s, and if you're curious what it looked like originally, take a look through the magazine article announcing its completion.