Cor-Ten steel does not have to be applied to thick panels, like in Richard Serra's artwork. In the case of this barn that accompanies a larger main house in Santa Cruz County, California, the rust is found on corrugated steel sheets that comprise the walls and roof. The barn is a renovated warehouse and the architect's treatment of it gives it a very monolithic appearance. (A close look at the concrete footing behind the plants in the lower left illustrates the staining that comes from using weathered steel.)