Spaceship House (1973, Tennessee USA)

The Spaceship House (also known as the Space House) is a flying saucer–shaped modernist house on Signal Mountain in Chattanooga, Tennessee, United States. Designed and built by Chattanooga builder Curtis W. King as a bachelor pad for his sons, the circular house has since become a local landmark on U.S. Route 127.

https://en.wikipedia.org/wiki/Spaceship_House