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.

Guadalcanal, the largest island in the Solomon Islands, offers a captivating blend of history, natural beauty, and vibrant culture. This Pacific paradise is most famously known as the site of a pivotal World War II battle, where Allied forces fought fiercely against Japanese troops. Visitors can explore this rich history at the Vilu War Museum, which houses relics, artifacts, and memorials that bring the island's past to life.

One of the four islands that make up the British Virgin Islands, Jost van Dyke is a Caribbean paradise known for its white sand beaches, turquoise sea pools, and marinas filled with yachts.

Petrified Forest National Park stretches across the colorful high desert of northeastern Arizona, where grasslands, mesas, badlands, and ancient fossil deposits form an unusual landscape. The park is best known for its extensive petrified wood, much of it preserved from trees that lived in a river environment more than 200 million years ago.

A frequent stop for Caribbean cruises, this Central American destination will delight you with local flea markets, museums, and delicious eats.