This ornate English estates "Prodigy House" still bears the cannonball marks of civil war.

This East End pub gained notoriety as the site where gangster Ronnie Kray publicly shot a rival.

This unassuming building produced some of the world's most famous bells.

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

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

The bones of two medieval royal lions were discovered at the historic fortress.

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

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

Where condemned pirates met their grisly end at the gallows on the River Thames.

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

A relic from one of London's worst 19th-century slums.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

Historic church where a number of Shakespeare's actors are buried.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A unique tribute to the millions of animals who served and died for the British military.

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

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

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

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

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

A quiet memorial to those who died saving others in the heart of the City of London.

A cluttered and astounding collection of antiquities and curiosities.

The final resting place to 300 Victorian-era pets hides inside the city park.