https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8802854
Zome house using solar heating built near Corrales, New Mexico.
The modular interconnected units are hexagon shaped with polyhedra roofs. Aluminum construction has an inner core of urethane foam for insulating efficiency. Glass walls covered at night pass sunlight to heat blackened 55-gallon drums filled with water, 04/1974. Photographer: Norton, Boyd. Original public domain image from Flickr
Public DomainFree CC0 image for Personal and Business use