The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

One of the now-less-hidden floral gems of the "Emerald Necklace."

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Where condemned pirates met their grisly end at the gallows on the River Thames.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

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

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This stone tower in a small town's graveyard looks as though it would be more at home in a fairy tale.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.