Empty megamansions of the super rich

Stone Mansion Once listed at $49 million Paradise in the Garden State. 6 acre 30k sqft home is in one of the wealthiest ZIP codes in America Alpine NJ. Uninhabited by its owners. 11 beds 19 baths walk in vault wine cellar protected with biometric authentication movie theater sports bar basketball court & grand ballroom trimmed in 18-karat gold. Ultimate security with 2' thick walls & 29 cameras monitored from anywhere in the world. The tax bill is almost $300k a yr. Currently its off the market.