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

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

London's smallest police station is barely the size of a phone booth.

Eighty million natural history specimens call this gargantuan museum home.

Catacombs turned marketplace.

Hear the quietest sound from across the dome.

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

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

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

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

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.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This Bronze Age boat was found buried remarkably intact in an English gravel pit.

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

Amidst towering office buildings, a local pub lives inside Sheffield’s oldest surviving domestic building.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

The red letters in the literary pavement leading to the library form a mysterious code.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The Liverpool street made famous by the Beatles is real.

The quiet field that inspired one of the most famous songs of all time.

This tiny watering hole claims to have the smallest bar counter in Europe.

The city of Manchester quietly unveiled this tribute to a 19th-century massacre.

The remnants of a depressing public toilet are now a hub of ever evolving street art.