After the musical legend's death, his memorial was mysteriously graffitied in gold.

An amazing collection of sculptures and art.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

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

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

The bronze uniforms commemorate the vital role of women during World War II.

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

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

The commemorative stone column conceals a secret laboratory.

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

Ship-sized kinetic sculptural fantasy.

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

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

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

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

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

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

The modern birthplace of Irish freedom.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

Each year, one talented artist puts on a show sculpting twelve butter-based busts of dairy princesses.

Opened in 1956, the first modern indoor shopping mall in the world was inspired by the shopping arcades found in European cities.