Cruise ships have come a long way since the early days of cramped staterooms dressed in staid colors. Now, top architects and designers vie for the opportunity to design the suites aboard luxury vessels.

Spanning thousands of square feet—and costing thousands per night—these posh pied-à-terre-style digs often include floor-to-ceiling panoramic windows, en suite saunas or private spa treatment rooms, whirlpool tubs in the master bath (and sometimes on the veranda), and spacious living areas that are perfect for entertaining. Upholstery accents throughout may range from cashmere to crocodile, and it’s not uncommon for works by world-class artists to grace the walls.

Plus, the perks that may come with these top-notch suites are compelling: 24/7 butler service, priority embarkation, VIP access to the ship’s restaurants and entertainment, and entrance to private areas for suite passengers only. Take a look at the most beautiful cruise ship suites sailing the world’s oceans today.