16 Night Transatlantic Spain & Portugal

The Spanish island of Mallorca offers towering mountains and dramatic cliffs rising over clear, blue water — but its hidden gem is Palma de Mallorca, the island's capital and largest city, where you'll find quaint historic streets, Gothic castles and gastronomic delights. Cruise to Palma de Mallorca and check out one-of-a-kind Palma Cathedral: The 14th-century Gothic spires of exterior contrast the modernist interior designed by in the early 1900s by Gaudi. See the circular courtyard and Arab-inspired arches of Castell de Bellver, and take in the fresh scent of the miles of pine forest that surround it. Or rent bikes and pedal east to Palma Beach, where you can soak in the sun on the white sands and clear waves.

Spain's third largest city, Valencia offers a little bit of everything, from historic sites and bustling city squares to placid beaches. Soak up the sun at Malvarrosa Beach along the urban seafront, or head to El Saler for a more remote beach experience surrounded by white-sand dunes and pine trees. Cruise to Valencia and get your culture fix at Gothic Valencia Cathedral, and see the 15th-century renaissance paintings housed in its interior. Head to Plaza de la Reina in the city's old town and do some people-watching over a fresh glass of horchata, a classic Valencia beverage made from almond milk with cinnamon and spices, or take a picnic lunch of fresh pears and local cheese to the quiet Turia Gardens.

Cartagena greets you with its ancient Mediterranean port on Spain's southeastern coast. Originally governed by the Carthaginians and subsequently by the Romans, Arabs and Castilians, this pedestrian-friendly city is a history buff's dream port. Visit the 2,000-year-old Roman Theatre and the attached museum, where you'll find an ancient altar to Jupiter and a statue of Apollo. Then, check out the late 19th-century modernist architecture of Cartagena's historic center. Cruises to Cartagena, Spain allow you to stroll down blue-marble-tiled pedestrian-only Calle Mayor. Or take the 30-minute drive to the Batteria de Castillitos, a medieval-style fortress situated among the picturesque mountain landscape.

The hub of Spain's southern Costa del Sol, Málaga is the picture of paradise. Scale the hilltop to dramatic La Alcazaba, the sandy-colored Moorish fortress dating back to the 11th century that overlooks this ancient seaside city. Sun yourself on the idyllic beaches of Caleta and Malagueta, taking in views of the mountains across the bay. See the eccentric works of modernist master Pablo Picasso, the city's most famous native son, at the Picasso Museum. Cruise to Málaga and immerse yourself in baroque and renaissance architecture at Málaga Cathedral, with its elaborate arches and stone reliefs depicting the saints, or turn the clock back to the first century A.D. at the ruins of the Roman Theatre.

Portugal's island of Madeira is an adventure junkie's paradise. Explore this unique island by land, sea or air. Trek the levandas, the island's open canal system, and take in panoramic views of the mountains and the ocean. Dive into the deep blue sea to swim with fish and rare seals with your Madeira cruise. If you're looking for something to spike your adrenaline, soar above the island while hang-gliding or paragliding. In the mood for more low-key exploration? Stop by a local bakery for a slice of queijada, a regional cheescake, and walk along the harbor in Funchal, taking in the 17th-century architecture.

Floating off the west coast of Africa, Gran Canaria is an island where nature's many faces come together. A rocky coastline embraces most of the island, while beaches dot the periphery. Desert-style dunes adorn the south, and leafy mountains crown the center. Outdoor lovers will find spectacular views while they surf, hike, bike or go on a road trip with Canary Islands cruises. Meanwhile, urbanites can stroll through the museum, cafes and town squares of Las Palmas — this cosmopolitan center is the seventh-largest Spanish city, filled to the brim with buildings that make you forget you're on a tiny island.

The Canary Islands sit more than 1,000 miles from mainland Spain — but as your ship docks at the largest island, Tenerife, you'll feel like you've entered another world. Exploring the island's diverse nature will reinforce this: The landscape here ranges from to deserts to dense forests to spectacular beaches. Cool off in the Bajamar natural salt-water pools, or go scuba-diving among octopus and barracudas in Tabaiba. When you're tuckered out from your adventure, head to a seaside restaurant for a glass of sangria and crusty bread slathered with almagrote, a local hard-cheese spread flavored with tomato, garlic and paprika.