This home in Healdsburg, California, was designed to be fire-resistant and energy efficient. It generates enough energy to be ...

A trifold mattress (aka a z-bed or folding mattress) is a floor-friendly, thin memory foam mattress that's designed to be ...

Discover the truth behind the world's strangest architectural mysteries, from the underground city of Derinkuyu and the Egyptian pyramids to Canada's mother-in-law doors.