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.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

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

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

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

Giant, friendly pelicans in Central London, the most unlikely of places.

A tribute to all the green-thumbed workers who tend London’s public parks and gardens.

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

Hear the quietest sound from across the dome.

This may be the last of London's wooden pavements, which were once a common sight in the city.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This overlooked street light once served as a KGB dead letter box.

Public access to clean drinking water was an instant hit among the masses.

This plaque in one of London's oldest public hospitals commemorates the first meeting of two of Britain's most famous literary heroes: Sherlock Holmes and Dr. Watson.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

England's most famous front door has an accidental doppelganger.

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This luxury shopping lane has been protected by its own tiny police force for over a century.