3968 Pinnacle Sky Loop, Park City, UT 84098

In 1959, Alfred Hitchcock introduced audiences to a cliffside house so compelling that people have been searching for it ever since. The Vandamm House in North by Northwest was conceived as a cantilevered design in the Frank Lloyd Wright tradition, perched above Mount Rushmore. For more than six decades, it existed only in the cultural imagination. It has now been built. Once. On a ridgeline within Pinnacle, the ultra-exclusive gated enclave inside the gates of Promontory Club in Park City, Utah.

What separates this house from homage is the engineering that made it possible. Architects Michael Upwall and John Boccardo, together with Midway Construction and Canyons Structural Engineering, designed an infrastructure-grade structural system. More than five million dollars was invested in the foundation alone, including post-tension steel of the kind used in bridges and skyscrapers, four-foot concrete beams drilled into granite, and a post-tension concrete foundation. Together, these innovative elements support a 40-foot cantilever projecting the glass-walled great room in open air above the valley with unobstructed views in every direction.

Guests arrive the true Frank Lloyd Wright-inspired way: compressed beneath a walnut entry ceiling, before being released into expansive mountain views. The interiors hold the era without just imitating it, carefully curated to reflect the warmth and craftsmanship of classic mid-century design. Marvin Signature Ultimate windows, most extending from floor to ceiling. Top-of-the-line appliances from Sub-Zero, Wolf, and Miele. More than one million dollars of custom walnut cabinetry. Heath Ceramics tile handmade in Sausalito, California. Grass cloth, cork and vibrant wallpaper, with a warm late-1950s inspired color palette. ''Heroic Sunburst'' entry doors commissioned from Forms+Surfaces in Santa Barbara. Mid-century furnishings, and artwork, including many lovingly restored originals, are available with the purchase, allowing the