The commemorative stone column conceals a secret laboratory.

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

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

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

Catacombs turned marketplace.

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

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

A museum wholly devoted to juvenescence.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

A modern English garden of eccentric beasts, follies, and oddities.

A poignant memorial to the 106 coal miners killed in three major accidents in Derbyshire.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

The western face was supposedly left clock-less to snub the Welsh.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

The whimsical steel spider lurking in the shadows of this suspension bridge shows that engineers can have a sense of humor.

These unique stepping stones hug a river's edge to take hikers on a journey through a limestone gorge.

These legendary stone steps were once used to haul coffins up the rockface.

Though much of the castle was robbed of its stones, the underlying earthworks are among the best-preserved in England.

A stretch of land where the sour-sweet vegetable is cloaked in darkness and grows so fast you can hear it crack, squeak, and pop.

The remains of a remote village that once housed over 1,200 dam workers and their families.

A copy of the brutal decapitation device that predated the French Guillotine by about 200 years.