After traveling the world, the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

This tower is one of the best-preserved (and least-visited) remnants of medieval Paris.

One of London's lost rivers runs through a pipe over the tracks of this subway station.

An interim housing alternative to FEMA trailers that is designed for densely populated areas during recovery and rebuilding following a natural disaster.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

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

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

The site where two doves fell in love.

The location of this small park was once the site of an infamous public morgue.

Abandoned power station once home to a squatter community, now being developed into an arts center.

This stunningly massive housing complex is a go-to filming location for dystopian sci-fi cinema.

This renovated Art Nouveau bathroom from 1905 is worth the price of admission.

Marie Antoinette and Napoleon Bonaparte were fans of this 200-year-old French chocolatier.

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

The only female equestrian statue in Washington, D.C. is a 15th-century French heroine.

The cave of a 12th-century hermit is still visited and venerated today.

This translucent sculpture represents a quintessential component of New York City's skyline.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

This large garden vase urn has nothing to do with the seventh U.S. President—it was designed by one landscape designer to honor another landscape designer's contributions to the National Mall.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

In 1986, Keith Haring was arrested for painting this anti-drug mural on a Harlem handball court.

Shop at the 200-year-old store where Julia Child stocked up on copper cookware.

Order a boozy baba au rhum at the oldest patisserie in Paris.

Peruse produce from Senegal, Cameroon, and other West African nations at this sprawling market.