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.

Washington D.C. is the capital of the United States and home to some of the country's most iconic landmarks and monuments, including the White House, the Washington Monument, the Lincoln Memorial, the Smithsonian National Museum of Natural History, and the Capitol Building.

Midway between Salzburg and Vienna, Linz boasts beautiful Baroque buildings, including Old Town Hall and the Old Cathedral, Alter Dom.

At more than 7,000 feet above sea level in the Andes Mountains, this symbol of the Incan Empire was designated a UNESCO World Heritage Site in 1983 and was named one of the New Seven Wonders of the World in 2007.

The dazzling capital of the Czech Republic, the explorable Prague has fittingly been nicknamed "the City of a Hundred Spires." Halved by the Vltava River and notable for architecture Baroque, Renaissance, and Gothic, visitors will find much to take in here.