George Vanderbilt | $184 Million | Asheville, North

 The Vanderbilt name is old, and so it does not resonate that much with the current generation anymore. However, for those born in the early 1900s, this name commanded respect as they were in charge of many essential services then, including railroads, steamboats, and other business enterprises. One of the most notable members of this family is the art collector George Vanderbilt II.

Due to his obsession with art collections, and art pieces can be huge, Vanderbilt built a 250-room mansion so that he could house all of his collections in one place. Known as the Biltmore Estate, this palatial property is perhaps the closest the US could give credit in terms of a royal palace. More than 1,000 people toiled for six years just to get this constructed. It also sits on 100,000 acres of land, so we can only imagine the ground maintenance efforts.