This haunting sculpture was created as a statement on the mechanized warfare of the First World War.

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

This South London cemetery holds the remains of more than 15,000 people.

With a history stretching back to the 16th century, this pub has a few stories to tell.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

This sculpture of a pylon is upside down and askew, as if its main purpose is to confuse passersby.

Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

Putting the "mod" in "modular" since 2000.

Scattered throughout London are ancient remnants of the city's former bounding wall.

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

Murals of the wild parties once held on the frozen River Thames.

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

What might be the oldest living tree in London has survived fires, bombings, and estate agents.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

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

These Victorian era devil sculptures were designed to spite a local vicar.

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

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

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

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

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.