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.

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.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

A hidden medieval crypt where a famous legend says the devil used to teach black magic.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.