A jumble of concrete on the corner of one of London’s terraced buildings is actually a work of art.

A haunting painting meant to capture the calamity of World War I.

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

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

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

The final resting place of a German diplomat's beloved companion.

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

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

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

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

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

This mysterious and unique painting is filled with symbolism.

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

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

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

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

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

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

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

The broken skateboards that became a poignant memorial to a murdered skater.

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

An architectural oddity hides in plain sight on this iconic London bridge.

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