Located in a rural area south of Seattle, on a boundary between forest and meadow, this three-story house was designed for two avid ornithologists. Window walls, rooftop terraces, and small outdoor buildings allow nature to be experienced close-up and in every direction. The verticality of the structure, a stack of glass boxes, minimizes the impact on the site and provides vantage points for observing birds both at ground level and in the treetops.