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

A series of abstract, silly sculptures represent the works of a great modern classical composer.

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

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This bridge was constructed from the rubble of the infamous Bastille.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

This five-star hotel was originally a swanky parking garage.

A mysterious shape catches the eye in this 16th-century painting.

A faded reminder of what was once a common sight in London during the Blitz.

This mysterious and unique painting is filled with symbolism.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

An architectural oddity hides in plain sight on this iconic London bridge.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

A quiet memorial to those who died saving others in the heart of the City of London.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Scattered throughout London are ancient remnants of the city's former bounding wall.