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

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

This London plaque marks the spot where David Bowie's famous alien made his debut.

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

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

Dictionary Johnson’s favorite feline.

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

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

Eighty million natural history specimens call this gargantuan museum home.

An incarceration museum on the spot of possibly the oldest prison in England.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

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

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

Catacombs turned marketplace.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

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

One part local history, 99 parts gruesome haunted house.

An unusual round church in London with a Templar past.

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

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