America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

Museum dedicated to awful artwork.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

This oddly shaped boulder in Paris is rumored to be cursed.

One of Jeff Koons’s largest sculptures and his first commemorative work.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

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

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

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

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

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

This Parisian café sticks almost exclusively to an ethos of reuse.

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

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

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Museum preserving torture methods from the past.

Cat art as far as the eye can see.

The secret city built by the Manhattan Project.

A 70-foot replica of the famed Eiffel Tower.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.