The canine-themed book collection claims to be Europe's largest dog library.

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

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

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

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

A hidden path at the National Theatre lets you look behind the scenes of the latest productions.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Where condemned pirates met their grisly end at the gallows on the River Thames.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

This secluded walkway overlooks a magnificently wild London green space.

A naturally mummified 2,000-year-old man.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

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

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

An artistic tribute to the famous singer, just around the corner from where he was born.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

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

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

This 1920s Dutch barge is now a floating bookstore.

Hear the quietest sound from across the dome.

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

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

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.