Royal Carribean’s The Oasis of the Seas barely fit underneath the Great Belt Fixed Link (a Danish bridge) on its maiden voyage. The ship is five times larger than the Titanic and features telescopic smokestacks that can be lowered for tight situations. As the world’s largest cruise ship it has the superlative amenities to match its title for 6,300 passengers. One of the four pools has high-dive platforms. There’s a skating rink and a small golf course. A bar in its “Central Park” neighborhood moves between three decks. Built in Finland, it cleared the Great Belt bridge with a half-meter to spare.