Noirish green neon marks the location of one of the oldest private detective agencies in France.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

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

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

Inside a former cabaret, seven floors of erotic art.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

France's national museum of scientific and industrial instruments.

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

A surrealist timepiece by the artist of melting clocks.

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

Paris' fabled purveyor of exotic taxidermy and natural history curios.

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

A museum of carnival attractions where you are invited to ride the rides.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

The highest point on the island known for buildings that touch the sky.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

The "Seinfeld" diner.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.