<p>Royal Caribbean's newest ship &mdash; the $1 billion Oasis of the Seas &mdash; will offer passengers a number of &quot;firsts&quot; at sea: loft suites, an amphitheater with poolside performances, zip-lining and a carousel.</p><p>The Miami-based company unveiled Wednesday the latest amenities to debut on what will be the largest cruise ship in the world when it's delivered in 2009. The neighborhood-themed Oasis will sail from Port Everglades and will carry 5,400 passengers.</p><p>&quot;With our history of introducing game-changing amenities, we're pleased to be able to answer the question, 'What could possibly come next?'&quot; Richard Fain, chairman and CEO of Royal Caribbean Cruises Ltd., said in a written statement.</p><p>In addition to the previously announced Central Park neighborhood, officials said Wednesday the Oasis will feature a Boardwalk neighborhood, designed to remind cruisers of the seaside piers of yesteryear. Its centerpiece: a handcrafted carousel. The neighborhood's AquaTheater amphitheater will be the largest freshwater pool found on a ship and will host activities and performances.</p><p>Oasis thrill-seekers, meanwhile, will be able to fly across a zip-line cable suspended nine decks above the Boardwalk or get a workout on the two rock-climbing walls. And passengers have the option of staying in 28 two-level, loft suites with floor-to-ceiling windows and a spacious layout. </p><p>Rival Norwegian Cruise Line (NCL) announced Wednesday some surprises for guests aboard its two new F3 ships, set to debut in 2010. The 150,000-ton ships will carry 4,200 passengers and will feature party spots built like the world's trendiest clubs as well as chic, adult-only pool venues and a four-lane bowling alley, the cruise line said. </p><p>The ships will include the industry's first ice bar, in which the bar, walls, tables, stools, glasses and life-size sculptures are made of ice. The ice bar will host 25 people, who will be given fur coats, gloves and hats to keep warm, since the room temperature will not rise above 17 degrees.</p><p>&nbsp;</p>