A luxury yacht, Adastra, of Hong Kong, resembling a spaceship and described as one of the world's most amazing super yachts, is displayed at Yacht CN 2013 - an international boat show in Nansha Bay, Guangzhou, South China's Guangdong province, Oct 12, 2013. The 42.5-meter trimaran cost $15 million and was awarded for most innovative yacht design. Adastra can accommodate nine guests and six crew members. It has an integrated monitoring system and can be controlled from an iPad within 50 meters. More than 50 well-known yachts will be displayed during the show. [Photo/CFP]