Oceania Allura: 16-Night Transatlantic

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.

Gibraltar is a British Overseas Territory at the southern tip of the Iberian Peninsula, a 6.7-square-kilometer enclave dominated by the Rock of Gibraltar, a 426-meter limestone monolith that guards the western entrance to the Mediterranean.

Cartagena is a historic port city of about 215,000 people on Spain's southeastern Mediterranean coast, in the Murcia region. Founded by the Carthaginians in 227 BC (as Carthago Nova), the city has been contested by Carthaginians, Romans, Moors, and Spanish kingdoms, and its layered history shows in the archaeological sites scattered through the compact center.

Valencia cruise port is Spain's third-largest cruise port (after Barcelona and Palma de Mallorca) and a rising star on Western Mediterranean itineraries. Valencia sits on the east coast of Spain about 350 kilometers south of Barcelona and 350 kilometers east of Madrid.