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.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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.

The narrow passages will challenge even the bravest driver.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

In Faroese legend, this sinister horse-shaped beast lures unsuspecting passersby only to drown them in the lake.

This isolated structure beckons adventurers with sublime views of the Faroe Islands.

This isolated island is often capped by its own fluffy cloud.

These moss-covered medieval ruins tower atop the smallest of Ireland's Aran Islands.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

An abandoned faux-pub made famous by a Guinness commercial.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

The ruins of a medieval monastery named after a type of tree.

This 5,300-year-old tomb with mysterious carvings crowns an Irish mountain.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

This natural sea arch highlights Ireland's rugged coastal beauty.

This ancient Irish landscape boasts hundreds of legendary ruins.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

Certain traditions prevail on the least-visited island of the Aran Islands.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.