Futuro House is a round, prefabricated house designed by Matti Suuronen, of which fewer than 100 were built during the late 1960s and early 1970s. The distinctive flying saucer like shape and airplane hatch entrance has made the houses popular among collectors.” – Wikipedia
See more photos at World Of Mysteries: Abandoned 1968 Futuro House, Pennsylvania.
If you are interested in more on the Futuro House check out http://www.thefuturohouse.com