Behind one of the world's most impenetrable vaults is a massive collection of retail silver.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

The grounds of this Jacobean estate contain one of the oldest mulberry trees in England.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

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

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

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

There's an exclusive Beefeaters pub hidden in the Tower of London.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

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

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

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

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

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

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

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

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