One of the major rivers of the Iberian Peninsula, the Douro in north-central Spain and Portugal just might be the world's most beautiful wine region. Most of the river on the Spanish side isn't navigable, so river cruises generally travel roundtrip from Porto, on the coast of the Atlantic.

Ancient port and ship building center north of Edinburgh, it is now an important industrial center for Scotland.

Granada, nestled at the foot of the Sierra Nevada mountains in southern Spain, is a city where history and culture converge in a mesmerizing blend. The jewel of Granada is the Alhambra, a stunning palace and fortress complex that dates back to the 13th century. This UNESCO World Heritage Site is a testament to the city's Moorish past, showcasing intricate Islamic art and architecture.

Whittier is the perfect place to explore Alaska's natural beauty, providing access to nearby Emerald Cove Trail and Portage Pass Trail as well as Chugach State Park further northwest.

Wertheim is an enchanting town on the banks of the Main River in Germany. A favorite stop on European river cruises, highlights of this charming destination include the Wertheim Castle and the town center, where you can wind your way down cobblestone streets replete with 16th century architecture. Venture outside of town and follow the Tauber River to Kloster Bronnbach, an immense and ornate monastery dating back to the 12th century.

Padre Island is a long barrier island along the Texas Gulf Coast, extending beside the Gulf of Mexico from the Corpus Christi area toward the southern tip of Texas. Much of the island consists of broad beaches, coastal dunes, grasslands, tidal flats, and shallow lagoons. The northern section is closely associated with Corpus Christi, while South Padre Island is a developed resort community farther south.