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

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

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

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

Artists and musicians now rule over this former rail station.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

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

A cluttered and astounding collection of antiquities and curiosities.

Hidden beneath the streets of London is a secret subway that only carried mail.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

These stained-glass windows are all that remains of a building that was the target of one of the biggest explosions in London after World War II.

The world's largest collection of ship figureheads includes figures from legends and history alike, from Sir Lancelot to Abraham Lincoln.

A museum wholly devoted to juvenescence.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

One of the oldest cathedrals in the U.K. houses a priceless early manuscript.

A wonderfully eccentric Victorian-era museum and library.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.

Grotto replete with mystical designs laid out in glued shell mosaics.

A vintage penny arcade hidden in the back of a fun fair-themed bar.