This beautiful medieval Serbian monastery is home to frescoes, peculiar sculptures, and historical curiosities.

This mesmerizing medieval monastery-cave complex sits thousands of feet above ground overlooking a valley.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

One of Belgrade's most beloved animals.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

Yugoslavia's biggest underground airport lies in ruins.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A tiny chapel and burial site lurk underground in Jajce.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

An idyllic traditional timber village on a picturesque hill was built for a film.

Monasteries on rock pillars, once accessible only by frayed ropes.

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

At this 16th-century monastery in rural Bulgaria, visitors can also spend the night.

A massive cave once a secret military base is now home to thousands of bats.

Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

These cascading falls resonate throughout the Bulgarian forest.

One of the largest mines in Bulgaria is now home to a vast museum more than 100 feet underground.

Sofia's legislative center is continuously reinventing itself.

Said to be the only museum in the world dedicated to the most classic of all blooms, the rose.

Rock carving created 1,300 years ago 75 feet off the ground.

A vast Communist-era exhibition space in the Bulgarian capital.