When we went to Arlington Kansas for tea recently, we drove around town a bit and spotted these unusual structures.
Justin, a local guy, told us they are monolithic domes, which are great for energy efficiency. He had tried to convince his wife to get one, but she wanted a house with real walls and all.
There were three of them in a row - two finished and one they were working on.
I guess they are fire, earthquake, tornado and hurricane resistant.