A surrealist timepiece by the artist of melting clocks.

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

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

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

Rome’s legendary peephole vista is also a former Crusader stronghold.

A massive marble foot is tucked away in a small alley near the Pantheon.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The best place in New York to pick up the controversial, notoriously foul-smelling Asian "king of fruits."

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

One of the largest underground systems runs under Canada's largest urban center.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A contemporary fresco movement illustrates the region's rich history.