17. FAIR FIELD SAGAPONACK – NEW YORK
Source: theclever.com, thepinnaclelist.com, batesmasi.com
Estimated Worth: $ 248,5 million
This house belongs to Ira Rennet, a billionaire investor. Some special features of this large 63-acre estate are a synagogue, an orangery, a home theatre that can accommodate 164 people, a bowling alley and more. Best thing of all, it also has its own power plant – just in case the rest of the civilization around it crumbles.