The commemorative stone column conceals a secret laboratory.

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

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

Chelsea's soldiers were given strict orders when crossing this historic bridge.

Pop culture has helped to keep this iconic British building from being destroyed.

This charming, narrow-gauge railway in the Thames Estuary is sometimes referred to as the "Train to Nowhere."

The wreck of a B-29 Superfortress now stands as a memorial left in the moors.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A monument to the real explorer and bear who inspired characters in Philip Pullman's 'His Dark Materials.'

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

This unlikely memorial honors the Canadian and Portuguese laborers who felled trees for the Allies in World War I.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

Legend says these rocks used to be hunting dogs, a story that may have inspired Sherlock Holmes' most famous case.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A picturesque garden with a surprising past.

A rare full-sized statue of one of Britain's famous writers.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

Seat of the Duke and Duchess of Devonshire for centuries.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

This iconic Peak District ridge was once one of the busiest roads in medieval Britain.

All that remains of the fishing-vessel-turned-warship is its weathered hull.

A brick foundation and piles of listing building materials are all that remains of this World War II POW camp.