A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

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

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

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

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

This massive blockhead sculpture hides an entire library.

Fantastic views and thousands of love locks.

Sturdy scales are a surprising thing to find in a modern European city.

An exquisite Baroque church in Vienna's old town.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

This is the oldest Roman-made bridge in the city still existing in its original state.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

This curious, round temple is the oldest still-standing marble building in Rome.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

This elaborate towering structure was once famed for its revolutionary height.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

A layered tribute to the work of mosaicist Isaiah Zagar.

A geothermal paradise with bubbling mud pools and bright blue hot springs.