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

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

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

A memorial for public executions that dates back to the 14th century.

This pub boasts a curious history and may have inspired a Dickens character.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

Taxidermied animals galore, by appointment only.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

Order bagels and lox from an iconic Jewish delicatessen with nearly a century of history behind it.

Visit the grave of a famous feminist author and the mother of Mary Shelley.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

This 19th-century pub features stained-glass windows celebrating Victorian-era “champions.”

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

It holds a fabulously designed tribute to astronomer Edmond Halley.

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

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

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

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

One of America's founding fathers lived in this London lodging between 1757 and 1775.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

The purported midpoint in London from which all distances are measured has a tragic love story at its core

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