A photo taken on May 15, 2016 shows the Harmony of the Seas cruise ship as it sails from the STX Saint-Nazaire shipyard, western France out to sea. The world's biggest-ever cruise ship, the 120,000-tonne Harmony of the Seas, a luxury home on the waves for 8,500 passengers and crew, was handed over by a French shipyard after a 40-month engineering feat. At 66 metres (217 feet), it is the widest cruise ship ever built, while its 362-metre length makes it 50 metres longer than the height of the Eiffel Tower.The floating town, which cost close to one billion euros (dollars), has 16 decks and will be able to carry 6,360 passengers and 2,100 crew members. / AFP PHOTO / JEAN-FRANCOIS MONIER