Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

The modern birthplace of Irish freedom.

One of Ireland's most infamous prisons for rebels including men, women and children.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

A complimentary beverage is offered to the bodega's resident rodents every day.

An eerie collection of the surviving structures from a past celebration of the future.

The final resting place of the great navigator, or maybe his brother.

The Liverpool street made famous by the Beatles is real.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

Follow the original medieval paths that wind through this intriguing section of the city.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This ancient Egyptian obelisk still bears the wounds of World War I.

An architectural oddity hides in plain sight on this iconic London bridge.

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

This one has sailed five times as far as Sir Francis Drake's famous ship.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Pop culture has helped to keep this iconic British building from being destroyed.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

These barriers stand as stark reminders of Northern Ireland's troubled past.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

Trash-filled shrines to an unofficial saint known for her endless breast milk dot the highways of Argentina.

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.