A historic scientific breakthrough that crosses nine borders.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

Spend your honeymoon where the Devil had his wedding.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Learn about the last river many crossed to find freedom from slavery in the United States.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

Space-age monument to an early 20th-century uprising.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

This World War I fortress is the perfect place to catch a Montenegrin sunset.

This memorial to local World War II heroes is slowly being reclaimed by nature.

A swan-like monument on Obad's Hill honors those that defended the area from German invaders during WWII.

Its frescoes depict the likeness of Marshal Tito, Karl Marx, and Friedrich Engels burning in hell.

One of the world's oldest olive trees, thought to be over 2,000 years old.

Former military fort and site of untold horrors during WWII, this island may become the Adriatic's next luxury resort.

A curious cave church carved into the face of a cliff.

The only known mosaic depicting the Greek god of sleep, Hypnos.

On top of a resort town as old as the Bronze Age sits an incredible war memorial statue overlooking the beaches below.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

A tiny church on a man-made island in the Adriatic.