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

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

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

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

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

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

The remains of the great moral philosopher reside in a university in London.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

This five-star hotel was originally a swanky parking garage.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

Ship-sized kinetic sculptural fantasy.

The location Geoffrey Chaucer and tale-telling pilgrims set off for Canterbury in April 1386.

Before becoming a poet John Keats studied here to become a surgeon.

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

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

Black cat statues guard this temple-like Egyptian revival factory.

An unassuming London park is actually a pilgrimage site for modern clowns.

Visit the grave of a famous feminist author and the mother of Mary Shelley.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

This London marker celebrates the spot where the world-famous English band was founded.

This London plaque marks the spot where David Bowie's famous alien made his debut.

The real clothing store that inspired a fictional spy organization's front.

This luxury shopping lane has been protected by its own tiny police force for over a century.