Best for: Luxury cruisers looking for an active, yacht-style experience
Sails: The Caribbean, the Mediterranean
At a Glance: A Travel + Leisure World’s Best 2016 winner, placing eighth in the Small Ocean Ship category. Like its twin, SeaDream I, the 112-passenger SeaDream II combines the best of a yacht and a cruise ship. Expect everyone-knows-your-name service, less-traveled ports, and luxe, personalized touches all voyage long.