With a number of environment-centric structures on the three-acre property, this home in Sebastopol, California, is a labor of love spanning a decade. The latest addition is the 713-square-foot, indoor/outdoor Shotcrete dining pavilion dubbed the Amoeba. Cut-outs in the concrete slab floor create space for an indoor jungle of taro, fig trees, bird-of-paradise, and bamboo; a sub-surface drain connected to a perforated underground pipe slowly filters out excess moisture to the groundwater.