In a Finnish shipyard, the 250,800-ton sister of Icon of the Seas, the world’s largest cruise ship, is in the final stages of construction. We got an inside look. Travel and Vacations, Building (Construction), Cruises, Royal Caribbean Cruises Ltd, Icon of the Seas In a Finnish shipyard, the 250,800-ton sister of Icon of the Seas, the world’s largest cruise ship, is in the final stages of construction. We got an inside look. NYT > Business