The final resting place of soldiers' loyal canine companions.

Protecting the dead from opportunistic body snatchers.

The most loyal of little dogs, or a Victorian era publicity stunt?

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Morocco's largest Jewish cemetery.

The oldest known university in the world is in Fez, Morocco.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

The other side is actually green.

Traditional 11th-century outdoor tannery.

Mosaics, storks, and brothels—this ancient city has it all.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

Slum Settlement Filled With Mountains of Garbage.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Oriental bazaar in the heart of Sarajevo.

Structure built from the skulls of vanquished foes.

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

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

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

Gargoyle head that brings good luck.

A musical instrument played by the sea.

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

Where the lovelorn find a home for their sentimental keepsakes.