An eerie ship cemetery with gunfire as a soundtrack.

Third time's a charm, or in this case, two testicles are.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

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

"Holy Wisdom" overlooks the city that became its namesake.

This historic black and white monastery is one of Bulgaria's architectural jewels.

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

The bizarre rocks of Đavolja Varoš are the result of natural erosion.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

This 16th-century covered market is still open everyday.

One of the world's best-preserved Roman amphitheaters is also one of the most unusual; it's made of black volcanic rock.

One of the oldest monasteries in the world is a key pilgrimage site for both Muslims and Christians.

Also known as the Great Mosque of Damascus, this is one of the world's largest and oldest mosques.

Mysterious lost empire of the Silk Road.

This ancient mountain monastery welcomes all manner of faith in an effort to keep Christians in Syria.

A historic sanctuary in the last refuge of the Aramaic language.

Ruins of the Crusaders' headquarters.

A 1,500-year-old ghost settlement is slowly fading away.

Amid the rubble of Aleppo's Old Quarter, part of a historic market has been restored and re-opened.

One of the oldest and largest castles in the world.

Four steel monoliths stand in the Qatari desert, in a breathtaking work of large-scale art by Richard Serra.