A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

Whitewashed mosque contains the world's largest carpet.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

This Norman castle was once the site of a Victorian-era prison, and now exists as a luxury hotel.

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

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

The Tudor-style cottage in the middle of the square is not quite what it seems.

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

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

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

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

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

This inn of the court provides a fascinating window into London’s legal and architectural history.

A cluttered and astounding collection of antiquities and curiosities.

The cedar tree in Highgate Cemetery earned its title by accident.

Pop culture has helped to keep this iconic British building from being destroyed.

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

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

The last four extravagant street signs of London's historic banking street.

London's amazing modernist public square that never was.

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