An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

A surrealist timepiece by the artist of melting clocks.

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

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

Notorious artist squat renovated into legal studios.

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

A plaque on the base of this statue holds a bewitching design.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The middle finger of modernity.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

A rococo room covered entirely in porcelain originally constructed for another royal residence.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

"Drunken ship" sculpture memorializing the French poet in the city where he died.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

One man's remarkable private collection of art from around the world.

The world's oldest bookshop still in operation.