Plitvice Lakes National Park, Croatia

A forest reserve in central Croatia known for its terraced lakes, waterfalls, caves, and limestone canyons—and under threat from selfie-taking tourists.

Red Square of Moscow, Russia

A city square that sits directly east of the Kremlin. It features such beautiful buildings as St. Basil’s Basilica and State Historical Museum.

Rila Monastery, Bulgaria

The largest and most famous Eastern Orthodox monastery in Bulgaria, founded in the 10th century and rebuild in the mid-1800s.

Mont-Saint-Michel, France

A Gothic-style abbey built between the 11th and 16th centuries, perched on an islet exposed to dramatic tides in northwestern Normandy.

Budapest (Banks of the Danube, the Buda Castle Quarter, and Andrássy Avenue), Hungary

The central stretch of the city illustrates great periods of Hungarian history via stunning architecture,

…including such masterpieces as the Parliament (pictured), Opera House, the Hungarian Academy of Sciences, and the Market Hall.

Giant’s Causeway, Northern Ireland

A studded coast made up of about 40,000 polygonal basalt columns, the result of ancient volcanic activity.

Pont du Gard (Roman Aqueduct), France

An ancient Roman aqueduct that crosses the Gardon River in southern France. It carries water 31 miles to Nîmes and stands 160 feet high on three levels, making it a technical—as well as artistic—masterpiece.

West Norwegian Fjords, Norway

Situated in southwestern Norway,

Geirangerfjord and Nærøyfjord is among the world’s longest and deepest fjords. Their beautiful landscapes feature numerous waterfalls, glacial lakes, and forests.

Vatican City, Rome

One of the most sacred places in Christendom, ruled by the Pope.  The Vatican City houses many artistic and architectural masterpieces like St. Peter’s Basilica, the Sistine Chapel, and the Vatican Museums.

Pirin National Park, Bulgaria

A 154-square-mile national park in the Pirin Mountains in Bulgaria, covered by alpine meadows, glacial lakes, coniferous forests, and two designated ski areas.

La Grand-Place, Brussels, Belgium

Vernazza is the steepest and loveliest of the Cinque Terre villages, making it the ideal spot for a low-key romantic getaway.

Meteora, Greece

The idyllic, red-roofed town of Kastraki has one of the best backdrops imaginable: the famous Meteora monasteries, a UNESCO World Heritage Site surrounded by wildflower-filled countryside on mainland Greece.

Cobh, Iceland

The central square of Brussels, with homogeneous, architecturally opulent buildings dating from the late 17th century.

Old City of Mostar, Bosnia, and Herzegovina

A historic city in southern Bosnia and Herzegovina situated on the Neretva River. The town is well-known for its Old Bridge, built in the 16th century and considered as one of the greatest architectural achievements in the Balkans.

Ilulissat Icefjord, Denmark

A fjord in western Greenland, 155 miles north of the Arctic Circle. It includes Sermeq Kujalleq, one of the most active glaciers in the world.

Palau de la Música Catalana, Barcelona, Spain

A famous music hall, and one of the finest examples of Catalan modernista style—think rich details, floral motifs, and curved lines—by art nouveau architect Lluís Domènech I Montaner.