This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Giant, friendly pelicans in Central London, the most unlikely of places.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

London's old-school healing garden.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The largest of London's subterranean rivers and once a mad, bad center of London life.

The final resting place to 300 Victorian-era pets hides inside the city park.

London's smallest police station is barely the size of a phone booth.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Rebuilt remains of a temple to Roman god Mithras.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This South London cemetery holds the remains of more than 15,000 people.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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.

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

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

Swedish mice can dine at the Nuts of Life restaurant or take a date to the amousement park.

Legend has it this spring formed at the spot where a medieval Swedish king was killed.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

Stockholm's narrowest alley is barely over two feet wide.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.