ABSTRACT Perched on a cliff above Lake Erie in western New York, USA, Graycliff blends use of local stone with design elements of Organic Architecture that architect Frank Lloyd Wright had experimented with at Taliesin, his stone residence and studio in Wisconsin. Graycliff stone walls were built with Tichenor Limestone and glacial erratics including gneisses and granites. Middle Devonian fossils including corals, crinoid columns, and brachiopods are displayed prominently on Graycliff walls. The diamond shapes of some Tichenor Limestone boulders, formed by intersecting natural fractures found in nearby bedrock, provided an organic theme for architectural details. The relationship between fractures and small faults and folds interpreted as post-glacial pop-ups in the Graycliff area suggest that fractures key to the diamond shape formed during deep burial, possibly with enhancement during uplift and post-glacial isostatic rebound. Medina sandstone coping and paving stones were recycled from Buffalo, New York, sidewalks and likely were quarried along the Erie Canal. A natural gas well on the property produces from Medina sandstone deep underground. Many elements of organic design at Graycliff occur in later Wright-designed houses with significant stone components, including plan-view orientation of the house that fits both Wright’s organic design ideal and the natural terrain; windows that provide exceptional views of natural features of the site; and irregular edges of wall stone and pavers. Exposures of the Tichenor Limestone and adjacent shales in nearby Penn Dixie Fossil Park provide the opportunity to observe and collect fossils from rock strata displayed on Graycliff walls and exposed in the lakeshore cliff. Small faults and folds partially exposed in the quarry at Penn Dixie may be pop-up structures analogous to interpreted post-glacial pop-up structures well exposed in cliffs at Ripley Beach and elsewhere along the western New York lakeshore.