This building contains a door only used by members of the royal family.

A friendly pub with a sordid past in cock fighting.

A totem pole of heads to represent the different stages of life.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

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

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

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

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

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

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

The Great Fire of London and the regulation of one-way streets both started in this alley.

The commemorative stone column conceals a secret laboratory.

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.

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.

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

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

This sanitized yet surreal depiction of a Greek fertility god looks over a square in one of central London’s residential areas.

A lasting remnant of the London Blitz.

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

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

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

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