The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

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

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

The medieval woodcut-style artwork chronicles life in medieval London.

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

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

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Experience history from the stomping grounds of the great Scottish poet.

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

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A living memorial to the trees London lost during the Great Storm of 1987.

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

Hear the quietest sound from across the dome.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

This one has sailed five times as far as Sir Francis Drake's famous ship.

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.

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