
Crystal Serenity —
Crystal Serenity's round-the-world journey, which departs from San Francisco, lasts 101 nights and stops in Alaska, Asia, Australia and the South Pacific.

Crystal Serenity Penthouse Suite —
The ship's top accommodation is the Penthouse Suite, which goes for $199,370 per person and includes your own butler.

Silversea Whisper —
If you're going to be on a boat for months at a time, you'll want it to be this one. Silversea's 115-day world cruise on the Silver Whisper stops in 51 ports in 31 countries.

Silversea Whisper Owner's Suite —
The two-bedroom Owner's Suite costs $201,250 per person. The price includes Relais & Chateaux restaurants, butler service, unlimited shore excursions, all liquor and beverages, pre-paid gratuities, Wi-Fi and first-class air travel.

Cunard Queen Elizabeth —
Legendary liner Cunard's Queen Elizabeth ship starts and ends its 120-day journey in Southampton, England. Stops include Madeira, Réunion, Namibia and Curacao. The priciest option is the 1,375-square-foot Grand Suite, which costs $194,000 per person.

Queen Elizabeth Britannia Restaurant —
Think you'll get bored dining in the same restaurants every night? The Queen Elizabeth is Cunard's newest ship, offering more than 10 eating and drinking options.

Regent Seven Seas Navigator —
Regent Seven Seas' round-the-world journey lasts 128 days and stops in six continents. Highlights include the Panama Canal, French Polynesia, India and an extensive Mediterranean tour, before finishing with a transatlantic crossing back to Miami. The ship's Master Suite costs $162,000 per person.

Regent Seven Seas Navigator —
Onboard diversions include three restaurants, a casino, several lounges, a library, pool and theater. The price is all-inclusive and passenger numbers are comparatively low at 490 guests.

Oceania Cruises, Insignia —
The Oceania's "Around the World in 180 Days" sailing includes number of events, from dinners in Hong Kong and Singapore to a Polynesian lunch in Bora Bora and a tour of Hawaii's Hilo Volcano Winery. Other stops include New Caledonia, Myanmar, Zanzibar and Penang.

Pool deck —
Oceania Insignia has five restaurants, a coffee bar, pool, library, casino, spa, sport club, lounge theater and the Artist Loft enrichment center.