Dine on dumplings at the oldest dim sum restaurant in New York.

The notorious headquarters of a corrupt political machine.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

One of only two commuter aerial tramways in the United States.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

The French leader's hat sits in a glass case at the oldest restaurant in Paris.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

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

Executions were once held near this beautiful 18th-century fountain.

A phantasmagoric tomb honors a Belgian artist-scientist's contributions to the world of spooky entertainment.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

The only house built with a turret, crenellations, and a moat in Palmer, Alaska.

This popular fishing spot at the outflow of a 4.5-mile long hydroelectric tunnel sports a jetty literally made out of classic cars.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

This outdoor exhibit features a historic wooden dam once used to help boats navigate the Ohio River.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

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