Oceania Sirena: 12-Night Europe

Barcelona cruise port is the busiest in the Mediterranean, handling millions of passengers a year across multiple terminals. The city behind it earns that traffic.

Alicante is a mid-sized Spanish city of about 330,000 people on the Costa Blanca in southeastern Spain. It's a working Mediterranean city that happens to have a beautiful waterfront, a hilltop castle, and some of the best weather in Europe.

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.

Arrecife is the capital of Lanzarote, one of the Canary Islands in the eastern Atlantic Ocean about 125 km off the coast of West Africa. The island has about 155,000 residents and a landscape unlike anywhere else in Europe: volcanic craters, lava fields, black sand beaches, and an almost lunar terrain shaped by eruptions in the 1730s that buried a third of the island.

Las Palmas de Gran Canaria is the largest city in the Canary Islands, a Spanish archipelago off the northwest coast of Africa. The city has about 380,000 residents and serves as a major embarkation port for Canary Islands cruises and a regular port of call on Atlantic, repositioning, and West Africa itineraries.

Santa Cruz de Tenerife is the capital of Tenerife, the largest of Spain's Canary Islands, located in the Atlantic Ocean about 300 km off the coast of Morocco. The cruise port sits in the heart of the city, directly adjacent to the commercial center and within walking distance of the main shopping street and waterfront.

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.