An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

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

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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

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

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

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

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

A unique waterfall that some believe attracts the fairfolk.

A site of pagan worship which still attracts people looking for fairies.