These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

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

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

Recently restored menagerie of Victorian-era beasts.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The castle still holds traces of the abandoned Roman fort it was built atop.

This stone in Lexington honors a formerly enslaved man who fought during the American Revolution.

The site of the Andover Witch Hunts, which ended with more witch accusations and arrests than Salem.

These murals stand as reminders to the troubled history of this Northern Ireland city.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

A walk through the historic city center, under the streets of Seattle.

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

Martha's Vineyard's most beloved speakeasy sells late-night pastries.

Utopia and nostalgia mingle at the site of Bronson Alcott's ill-fated agrarian commune.

The Boston home of a conductor on the Underground Railroad.

The oldest continuously-operated inn in the United States, once owned by Henry Ford.

Dedicated to "the father of U.S. life insurance."

Designed to honor all those that work as nurses around the globe.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

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