Albania, on Southeastern Europe’s Balkan Peninsula, is a small country with Adriatic and Ionian coastlines and an interior crossed by the Albanian Alps. The country has many castles and archaeological sites.

Angkor Thom, located in present-day Cambodia, was the last and most enduring capital city of the Khmer Empire. It was established in the late twelfth century by King Jayavarman VII.

Ankara, Turkey’s cosmopolitan capital, sits in the country’s central Anatolia region. It’s a center for the performing arts, home to the State Opera and Ballet, the Presidential Symphony Orchestra and several national theater companies.

Appleton is a city north of Lake Winnebago, in Wisconsin. Overlooking the Fox River, the 1882 Hearthstone Historic House Museum has original Thomas Edison light fixtures.

Aspen, in Colorado’s Rocky Mountains, is a ski resort town and a year-round destination for outdoor recreation. It's also known for high-end restaurants and boutiques, and landmarks like the Wheeler Opera House, built-in 1889.

Athens is the capital of Greece. It was also at the heart of Ancient Greece, a powerful civilization and empire.

Barcelona, the cosmopolitan capital of Spain’s Catalonia region, is known for its art and architecture. The fantastical Sagrada Família church and other modernist landmarks designed by Antoni Gaudí dot the city.

Bursa is a large city in northwest Turkey, lying in the foothills of roughly 2,500m-high Mount Uludağ near the Sea of Marmara. The city is known for its mosques and historical sites from the early Ottoman Empire.

Cēsis is a town in northeastern Latvia, known for its medieval castle. First built in the 13th century and rebuilt many times since, Cēsis Castle features wall paintings, dungeons and towers with views.

The Czech Republic, also called by its short-form name, Czechia, is a landlocked country in Central Europe bordered by Austria, Germany, Poland and Slovakia.