Designed by Sussex-based designer John Shuttleworth, the Adastra may look and sound like a spaceship at first, but it’s just an ultra luxurious superyacht. It measures 140-feet-long and is built for speed while not sacrificing fuel consumption. The watercraft has a top speed north of 23 knots, and only needs to refuel once every 4,000 nautical miles, thanks to the gratuitous use of carbon fiber throughout.