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

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

A unique tribute to the millions of animals who served and died for the British military.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This overlooked street light once served as a KGB dead letter box.

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

A mysterious carving from 17th-century London seemingly depicts a young boy sitting on a bread basket.

A quiet memorial to those who died saving others in the heart of the City of London.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

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

Public access to clean drinking water was an instant hit among the masses.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

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

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

An unusual round church in London with a Templar past.

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

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

These ornate arches show how the course of the River Thames has changed.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This 18th-century sundial was designed to calculate the date of Easter each year.

Former hunting lodge of a duke who was an avid collector of impressionist works.