The Sleeper Family Sandstone Cave Home is one-of-a-kind. The family decided to move from their home in Missouri when they saw three acres of land plus a sandstone cave up for sale on eBay. The Sleeper family had intentions to build on the land--until they saw the cave and decided to use the natural space as a base for their home.
The result? A cave house. How cool would it be to tell your friends you live in a cave house? Except for the sand that would fall on you when you sleep, I think this is a pretty smart and economic use of land. The Sleeper Family Sandstone Cave Home is eccentrically cool.