Oceania Marina: 16-Night Transatlantic from Miami

Miami cruise port, officially called PortMiami, is the busiest cruise port in the world by passenger volume. Millions of people pass through here every year, and nearly every major cruise line uses it as a home port.

The Royal Naval Dockyard at Kings Wharf is Bermuda's primary cruise port, set within a restored 19th-century British naval base with shops, restaurants, and the National Museum. Bermuda's famous pink sand beaches and pastel-colored houses are accessible by ferry or bus.

Cadiz is the actual cruise port marketed as "Seville (Cadiz)" by cruise lines because Seville, Spain's fourth-largest city, is the primary day-trip draw from this port. Cadiz itself is one of Europe's oldest continuously inhabited cities, perched on a narrow peninsula jutting into the Atlantic on Spain's southwestern coast.

Malaga cruise port is the main gateway to Spain's Costa del Sol and Andalusia. The city sits on Spain's southern coast, about 130 kilometers west of Granada and 50 kilometers east of Marbella.

Cannes is a Mediterranean resort city of about 75,000 people on the French Riviera, known worldwide for its annual film festival but offering far more than red carpets and paparazzi. The city sits on the Golfe de la Napoule with the Esterel massif's red porphyry cliffs rising to the west and the rolling hills of Provence behind.

Florence (Livorno) cruise port is the main Tuscan stop on Mediterranean itineraries, but it's worth being clear about what you're actually docking at. The port is Livorno, a working industrial city on the Ligurian coast, about 85 kilometers west of Florence.