The site where two doves fell in love.

This demon atop the Notre-Dame de Paris looks utterly bored.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The narrowest street in Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This 400-year-old tree is actually an immigrant from North America.

A surrealist timepiece by the artist of melting clocks.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

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

The video game-themed street art first popped up in the French city.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

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

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

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.

A large portion of this navigable canal runs under Paris's famed boulevards.

This bridge was constructed from the rubble of the infamous Bastille.

Venice's island of the dead.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.