Check out this super yacht called Adastra. 4 year ago it was just a concept but now John Shuttleworth Yacht Designs has developed it in real. This luxury yacht offers high speed traveling with luxury accommodation, fuel efficiency and capabilities of a stripped down cruiser. The overall structure is custom-built with lightweight carbon fiber with Nomex honeycomb core, the hull is glass/kevlar foam sandwich and the interior is also light-weight oak cabinetry using honeycomb panels. Smashing!
Available at shuttleworth.com for $15 million