Listed for $1 billion, The Mountain of Beverly Hills is officially the most expensive property in the history of Los Angeles (if not the world). There’s no mansion here yet, so you better bring your architect. But what a small inconvenience compared to what you are getting - the most exclusive promontory real estate in the USA. One-of-a-kind, The Mountain spans a stupefying 157 acres (nearly twice the size of Disneyland), with an über private road that serpentines skyward tow