A bizarre house filled with an astounding array of collections.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

An abandoned outdoor movie theater in the Sinai desert.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This 220-year-old house is a reminder of New York City's Dutch past.

A Yiddish theater turned movie house turned rock and roll landmark turned gay disco turned bank.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

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

New York City's first Modernist house.

Built just after the American Revolution, the oldest row house in New York City still stands in Chinatown.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

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

A subterranean shelter remains intact under a busy Paris railway station.

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

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

Egyptian Revival movie palace abandoned for decades and restored in 2013.

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

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

A surrealist timepiece by the artist of melting clocks.

A museum of magic with a Sadist past.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Abandoned railway line circling the city of Paris.