The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

A network of concealed passageways lies within a busy London Underground station.

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

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

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

Banksy gives themself artistic license with this piece of London street art.

Hidden beneath the streets of London is a secret subway that only carried mail.

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