The story of Jed Clampett is, by now, a legend. A poor mountaineer, he could barely feed his family of four, but one day, while he was out hunting for food, he fired his rifle into the swamp behind his shack—and struck oil. The sale of the resource-rich land, in 1962, would eventually net him between $25 million and $100 million, and he did what anyone with sudden riches would do: He packed up his truck and moved his clan to Beverly Hills, where their adventures would be the subject of nine seasons of the Beverly Hillbillies.

Now the Bel Air estate featured in the (fictional) show’s opening credits is up for sale—and as befits a wealthy, cultured oilman like Jed Clampett, it’s the most expensive listing in the country at $350 million.

“Chartwell”—10.3 acres of land centering on a 25,000-square-foot mansion inspired by French Neoclassical design—went on the market this week, besting its closest competitor, a Beverly Hills spec house, by $100 million.