This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

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.

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

The oldest stone house in Paris was built by its most famous alchemist.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An alchemist's "magic door" stands in the middle of a Roman park.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

The private clubhouse for the members of the Academy of Magical Arts.

Unlock the secrets of the conjuring arts.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.