Unveiled this past weekend at the Concorso d'Eleganza at Villa d'Este, the rolls-royce Sweptail was commissioned by an individual customer back in 2013, who requested a one-of-a-kind model inspired by luxury yachts from the '20s and '30s. Design highlights include a pantheon grille, which is milled from a single piece of aluminum and is flanked by thin LED running lights and circular headlamps, as well as single-piece glass panoramic roof that tapers into the car's fastback rear end. The interior is appointed with contrasting open-pore leather and ebony trim throughout. Passengers will can avail themselves to a teardrop-shape rear parcel shelf, a champagne cooler in the center console and electronically operated luggage panniers designed to store a custom-made carbon fiber luggage set. The cost? A reported $12.8 million USD, making it the most expensive new car of all time.