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.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

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.

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.

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

Ship-sized kinetic sculptural fantasy.

Every fifth of November, effigies of Guy Fawkes are thrown onto bonfires across Great Britain. But this Guy has managed to survive his fiery fate for almost 300 years.

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

It holds a fabulously designed tribute to astronomer Edmond Halley.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

At almost 1,000 years old, this is the oldest known door in all of Britain.

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

One of the shortest streets in York has an especially odd name.

Makers and sellers of the original and finest York Ghosts.

One of the first monuments dedicated to the accomplishments of the great Vice Admiral, Horatio Nelson.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Erected in memory of Sir Arthur Conan Doyle, who was born close to this spot, this statue commemorates the author and his famous detective.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

It's said this was once the home of King James V's pet lion.