This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

The world's tallest bridge is also possibly the most elegant.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Historic medieval fortified city in southwest France.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

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

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

The first green space constructed on an elevated viaduct.

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

Hundreds of hidden passageways weave through the old quarters of Lyon.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

One of the greatest maze designer’s greatest mazes.

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

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

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

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

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Looming communist pillar with a Czech twist.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.