One of the most remote and isolated villages on the Arabian Peninsula.

God's Saharan sandbox of wrath.

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

Traditional 11th-century outdoor tannery.

One of the most spectacular canyons in the world.

Massive volcano in the Andes is the farthest point from earth's center.

Charnel house at the foot of Mount Sinai.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Historic medieval fortified city in southwest France.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

Abandoned railway line circling the city of Paris.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The largest hewn stone in history.

18th century underground pilgrimage site, dedicated to a Saint that did something...

A city built from mud and known as the "Manhattan of the desert."

Huge Russian Orthodox cemetery in danger of being converted into open public space.