Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

London's amazing modernist public square that never was.

The last four extravagant street signs of London's historic banking street.

These Victorian era devil sculptures were designed to spite a local vicar.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

Scattered throughout London are ancient remnants of the city's former bounding wall.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The ritual has been performed uninterrupted for nearly 700 years.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

The largest of London's subterranean rivers and once a mad, bad center of London life.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The commemorative stone column conceals a secret laboratory.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The broken skateboards that became a poignant memorial to a murdered skater.

The sumptuous ceiling was one of the last things Charles I saw before his execution.