This 2,000-year-old city, where the Teutonic Order founded one of its first commanderies in the 13th century, lies on the convergence of the Moselle and Rhine Rivers. Hop on a cable car, one of the city's most popular attractions, for stunning city-wide views, or cruise down the Rhine to spot some of Koblenz's magnificent fortresses and castles, including the Ehrenbreitstein Fortress and Schloss Stolzenfels.

Evidence of our nation's birth abounds in Boston, a hub of revolution that is essentially the oldest city in the United States. Visitors are compelled to walk the 2.5-mile Freedom Trail around the city center, and bear witness to 16 historical locations related to the history of America.

Seattle is a city shaped by water, mountains, and innovation. Its skyline, dominated by the Space Needle, tells only part of the story. Beneath it lies a vibrant mix of neighborhoods, each with its own character. Seattle was the birthplace of grunge music and remains a stronghold for independent arts. The Museum of Pop Culture (MoPOP), located at the Seattle Center, celebrates the city’s creative spirit with exhibits on everything from Nirvana and Jimi Hendrix to science fiction and gaming.

Salvador da Bahia, often simply called Salvador, is a city where the soul of Brazil truly shines. As the capital of the state of Bahia and one of the oldest colonial cities in the Americas, Salvador offers a rich tapestry of Afro-Brazilian culture, vibrant music, and historic architecture.

Kerala, India is a lush, tropical paradise that captivates travelers with its serene backwaters, vibrant culture, and stunning landscapes. Nestled between the Arabian Sea and the Western Ghats, Kerala boasts a unique blend of natural beauty and cultural richness. The tranquil backwaters of Alleppey and Kumarakom offer a quintessential Kerala experience, where visitors can cruise on traditional houseboats through a labyrinth of canals, lagoons, and lakes.