Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

Christ's blood preserved in a Belgian town.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

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

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

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

Explore nearly 400 years of English middle-class home life.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

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

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A historic house left in "dramatic still life."

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

One part local history, 99 parts gruesome haunted house.

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.