Oceania Sirena: 14-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.

Funchal is the capital of Madeira, a Portuguese island in the Atlantic Ocean about 600 miles southwest of Lisbon and 400 miles north of the Canary Islands. The island is volcanic, mountainous, and green, with a subtropical climate that keeps temperatures mild year-round.

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.