The narrowest street in Paris.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

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

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Internet rumors, often involving Icelandic singer Bjork, have abounded regarding this isolated outcrop of rock.

Flaming barrels of tar race through these village streets on Bonfire Night, a tradition that dates back centuries.

A quirky mausoleum celebrated once every five years with young dancing girls, widows, a tax man, and more.

Alaska Natives have lived on this tiny isolated island in the Bering Strait for over 5,000 years.

Two islands just 4 km apart separated by an International Border and Date Line.

The "Gateway to the Arctic" connects Barrow's indigenous population with the sea and its traditional industry: whaling.

The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

A mad mystery man who led Canadian mounties on a 150-mile wilderness chase is still buried with his secrets intact.

Natural earth mounds formed in the far north.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

The Arctic Archipelago is home to world's largest third order island: an island in a lake on an island in a lake on an island.

Neither bomb blasts nor heartbeats escape the giant ears of this super sci-fi Arctic outpost.

This aluminum “stairway to heaven” has impaled at least a couple of birds.

Known for the tunnel that leads visitors to the water.

Hundreds of bras, blowing in the wind.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

The most southerly spot on New Zealand's South Island is home to surreally shaped, permanently mangled trees.