One of the world's largest collections of pathological specimens.

The anatomical-pathological collection of a man who changed surgery.

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

Hear the quietest sound from across the dome.

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

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

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

The curios of pharmacist and collector Henry Wellcome.

One part local history, 99 parts gruesome haunted house.

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

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

Eighty million natural history specimens call this gargantuan museum home.

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

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

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

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

The first piece of public art dedicated to LGBT rights.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Nikola Tesla's former home contains an homage hidden from plain sight.