Luxury August 5, 2014updated 11 Jan 2016 2:20pm Largest Private U.S. Residence to be Offered at No-Reserve Auction By Spear's SUPREME AUCTIONS OFFERS SERENITY RIDGE, A 70-ACRE RETREAT NEAR DENVER, AT ABSOLUTE AUCTION SEPT. 27 Content from our partners How Guernsey’s private trustee structures can protect assets Luštica Bay: The Adriatic’s most coveted address AI, growth and public policy: What is the future for Britain? Related Luxury Assouline’s next chapter: interior decor for your home library Luxury The magical qualities of Tokaji wine Luxury CEO of ultra high-tech car company Lukas Czinger on 3D printing, AI and Enlightenment Spear's