✮ The Biltmore Estate gardens, Ashville, NC. One of those amazing places that you have to see to grasp the size. You can stand at one end of the house and see Mt Pisgah, 20 miles away, at one time the Vanderbilts owned all of the land betwenn this "home" and that mountain. It is the largest privately owned house in the United States, at 178,926 square feet.
French Renaissance-style Château - The Centerpiece of Biltmore Estate Biltmore House is a Châteauesque-styled mansion in Asheville, North Carolina, built by George Washington Vanderbilt II between 1889 and 1895. It is the largest privately-owned home in the United States, at 135,000 square feet (12,500 m2) (although publications claim 175,000 square feet (16,300 m2)) and featuring 250 rooms. Still owned by one of Vanderbilt's descendants.