48w999 Hinckley Road AUCTION BIDDING OPEN: Bidding ends June 30th. Previously Listed $6.3M. Current High Bid $2M. Showings Saturday & Sunday 1-4pm, and Daily By Appt. Where 138 acres of northern Illinois farmland meets stone and sky, Big Rock Estate is a world unto itself. Big Rock Creek winds through the grounds, and the circular drive announces your arrival past silos, a gatehouse, and outbuildings that speak to the full scope of what this estate holds. Inside the all-stone and brick primary residence, soaring ceilings, a dedicated library, a private office, and a chef's kitchen with Viking, Bosch, and Thermador appliances reward every closer look. A main-level primary suite and whole-home elevator make grand living feel effortless. Downstairs, a 101-foot indoor range, 12-foot wet bar, and safe room reveal a home that thinks well beyond the expected. Then there is the collector garage: 7, 082 square feet of heated space with 16-foot ceilings and room for 31+ vehicles, or 60+ with lifts. A separate guest house adds four bedrooms and three baths.