Set across approximately 9.595 acres in the Santa Monica Mountains, this extraordinary property presents a rare opportunity to own a truly one-of-a-kind retreat where architecture, nature, and adventure converge. The property enjoys sweeping mountain vistas, exceptional privacy, and a setting that feels worlds away while remaining remarkably accessible. Located just minutes from Westlake Village and Thousand Oaks, and approximately 4.5 miles from Leo Carrillo State Beach, it offers a unique blend of seclusion and convenience.nSurrounded by rolling hills, rugged canyons, and protected open space, the property captures panoramic views in every direction. Multiple outdoor entertaining areas, dining decks, lounge spaces, fire pit gathering areas, tent accommodations, and scenic overlooks have been thoughtfully positioned throughout the property to maximize its extraordinary setting. Whether hosting intimate gatherings, wellness retreats, creative workshops, outdoor adventures, or simply enjoying the tranquility of the landscape, the property offers an unmatched connection to the natural beauty of the Santa Monica Mountains. Its cinematic setting has also made it an appealing location for television, film, commercial, and print productions, offering the potential for ancillary income through location rentals.At the heart of the property is The Gesner Cocoon, a remarkable non-permanent ADU-style structure conceived and built by renowned mid-century environmental architect Harry Gesner. Originally envisioned by Gesner as a structure that would blend seamlessly with the surrounding environment, the Cocoon features inviting living spaces, kitchen and dining areas, bedroom accommodations, shower facilities, eco-toilet amenities, and an expansive deck with a built-in fire feature overlooking the surrounding mountains. Both visually striking and thoughtfully functional, the Cocoon serves as a centerpiece that embodies Gesner’s celebrated approach to environmental architecture. The property is further supported by a 10.8KW off-grid powerhouse, new 18KW backup generator, and automated wildfire suppression system.Throughout the property, winding paths and open clearings reveal a variety of scenic vantage points, each offering a distinct perspective of the surrounding mountain landscape. The combination of usable land, dramatic topography, and carefully curated gathering spaces creates a destination unlike any other in Southern California. Adding to the property’s extraordinary appeal, the sale includes original plans for CastleKeep, a dramatic custom residence designed by Gesner for this site. Seller will resubmit the plans during escrow should Buyer wish to pursue the project, providing a rare opportunity to continue the property’s architectural legacy and bring CastleKeep’s original vision to life.Accessible via Mulholland Highway, the property offers a compelling combination of privacy, scale, architectural significance, and future potential. Whether envisioned as a private retreat, recreational compound, hospitality concept, investment opportunity, or future estate site, this remarkable offering presents an opportunity to own one of the most distinctive properties in the Santa Monica Mountains.Property includes existing site improvements, structures, decks, tent accommodations, furnishings, and related improvements currently located on the property. Buyer to independently investigate and verify all permits, approvals, development potential, uses, condition of existing improvements, and all other aspects of the property.