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

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

This South London cemetery holds the remains of more than 15,000 people.

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.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Hidden beneath a restaurant, underground tunnels tell the story of Malta’s tragic role in World War II.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This unique building in the main square stands out among the city's typically Baroque architecture.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

Ancient mysterious ruts carved in the bedrock.

The eclectic seaside sanctuary caters to a rather fowl crowd.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

This subterranean necropolis holds three floors of antler-dug grave caves.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

A pagan tradition of draping trees with rags eerily lives on.

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

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

These fantastically named natural pools look like something out of a Scottish myth.