A tiny replica of the iconic London landmark hides on the side of the steel structure.

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

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

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

A building claimed to be London’s smallest house has an obscure history.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This ancient Egyptian obelisk still bears the wounds of World War I.

These ornate arches show how the course of the River Thames has changed.

This coffee shop lies hidden beneath a historic church.

London's smallest police station is barely the size of a phone booth.

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

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

Hidden beneath the streets of London is a secret subway that only carried mail.

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

An unusual round church in London with a Templar past.

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

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

An incarceration museum on the spot of possibly the oldest prison in England.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.