Lisbon, the enchanting capital of Portugal, entices sightseers with its vibrant color, stunning Gothic architecture, and temperate weather. Easily traversed by foot or tram, the city’s distinct quarters and vivid cultural landmarks make Lisbon an excellent spot for exploration.

Bangkok, Thailand’s capital, is a city of striking contrasts where gilded temples stand beside sleek skyscrapers and centuries-old traditions thrive amid modern life. At its heart is the Grand Palace, a dazzling complex that once housed the Thai kings, along with Wat Phra Kaew, the revered Temple of the Emerald Buddha.

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.

Costa Rica is a country that has built its identity around both natural preservation and cultural vibrancy. Known for its stable democracy and emphasis on sustainability, it has become a global leader in eco-tourism.

This small yet charming city in Alaska's panhandle is a throwback to the gold rush era. Skagway is a well-preserved part of Klondike Gold Rush National Historical Park.