A surrealist timepiece by the artist of melting clocks.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

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

This museum houses an imposing skeleton army comprised of creatures great and small.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

This Parisian fountain is a little bit fantasy and a little bit nightclub.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

This 18th-century sundial was designed to calculate the date of Easter each year.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Paris' linguistic guide to the international language of, yes, love.

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

The oldest and smallest cemetery in Paris is only open to the public twice a year.

This tiny little island has, as the name says, just enough room for its single house.

The private island of Yale's elite Skull & Bones society is kind of a dump.

The purported world's shortest international bridge connects a homeowner in Canada to his backyard in New York.

A castle built for love, and abandoned due to heartbreak.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

The first declared National Monument in the United States.

Only known mainland rookery of the threatened Stellar sea lion.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.