A canyon is a space no one designed. Its walls expose layers of rock deposited over millions of years, and the passage between them exists because water slowly wore that rock away. Glaciers shaped valleys in a similar way, leaving slopes behind as the ice retreated. Long before architects began shaping spaces, the Earth was already producing them.
Architects have long looked to the ground for geometry. A cliff can suggest a section, a cavity a room, and layered rock a way of stacking material. Some architects build directly into an existing formation, occupying a slope or a cavity on site. Others study a formation and reproduce some of its characteristics elsewhere, from precise geological data to the general experience of a landscape.
