The world's most active stratovolcano is almost always erupting.

Climb into Albania's communist history while enjoying a spectacular ocean view.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

A monument to the defenders of the Arctic in Murmansk, Russia.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

A place to see how French aristocrats lived in the early 1900s.

French commune at the heart of conspiracies.

France's high-tech, future-themed amusement park.

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

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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Pilgrimage site for star-crossed lovers.

This winding road through an Italian canyon may be the most scenic drive in the world.

The largest-known fragment of an asteroid that exploded over the southern Ural region in 2013.

Monastery, army base, and infamous Soviet Gulag in the far Russian north.

Unusual, mushroom-like rock formations caused by weathering and water erosion, set to disappear, according to geologists.

Former headquarters of the KGB.