A Roman spa buried deep beneath the City of London.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

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

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

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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

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

The childhood home of Earth's alien chameleon is a humble Brixton flat.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

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

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

Charles Babbage's proto-computer, painstakingly brought to life.

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

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

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

A network of concealed passageways lies within a busy London Underground station.

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.

Traveling collection of amazing automata.

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

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

This 1920s Dutch barge is now a floating bookstore.

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

A naturally mummified 2,000-year-old man.