Surreal riveted sea forts once protected the Kent shores from German attack.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

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

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

This tangled English forest looks like something right out of a fairytale.

Spend the night in this formerly abandoned traditional Scottish village.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

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

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Famously misunderstood wonder of the ancient world

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 astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This magical-looking island is notorious for the misfortunes suffered by its owners.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

Crushed coral and crystals give the sand its signature coloration.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Abandoned medieval hill town.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Rome's semi-secret peephole vista is also a former Crusader stronghold.