The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

How did a French journalist’s grave become the sexiest statue in the cemetery?

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This modest marker near Notre Dame identifies the very center of Paris.

Paris' linguistic guide to the international language of, yes, love.

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

This massive library holds what was once the largest book collection in the world.

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

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

A museum glorifying the life of Stalin, located in the city of his birth.

Small church on top of a huge rock column.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Legends surround an ancient tree trunk riddled with nails for good luck.

A museum capturing one of the world's most famous classical composer's battle with hearing loss.

A house carved into a rock in the 1940s.

A world of craftwork elegantly curated in a historic brick warehouse.

The colorful, smiling concrete silos of Vancouver.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

A 11-foot former president stands on a Kosovo street that also bears his name.

A futuristic, brutalist masterpiece that is also strangely prison-like.

In this roadside "community for the small," abandoned toys gain new lives.

While exploring the desert, you can stop by the home of a fictional heretic from a parallel universe.

Explore 10 acres of environmental sculptures.