The famous author's cottage hideaway.

The fading, forgotten remains of a once bright and booming factory.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

A multimedia experience that chronicles the atrocities of racism.

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

Nikola Tesla's former home contains an homage hidden from plain sight.

Venice's "Island of the Mad."

The final resting place of the poets Shelley and Keats.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

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

The loneliest island in New York.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

A tribute to Ponce de Leon's supposed quest for eternal youth.

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

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

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

Indents in the pavement are all that remain from a grisly death machine in Paris.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

One of the last Jazz Age "Wonder Theaters" in New York City.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.