No decade but the 1960s could have brought us this prefab spaceship-chic home. Finnish architect Matti Suuronen conceived of the Futuro House as a holiday home, but its UFO-like shape and simplicity earned its reputation as the house of the future. The two-bedroom, one-bathroom abode could be put together by four people in just a few hours. It was considered “portable” because it could be airlifted to a new location. Within a few years, the design was present all over the world. But the oil crisis in 1973 resulted in the cancellation of 15,000 homes, and the style fell out of favor. Today, only around 60 exist, from Rockwall, Texas; to Krasnodar, Russia; to New Taipei City, Taiwan.