An intricate network of underground tombs carved into volcanic rock.

This "volcanic all-day restaurant" is right on the beach.

An idyllic mineral hot springs facility with a more-than checkered past.

This historic high school was saved from demolition to become an island home for Marshall’s creative community.

Step past the gas pumps and into a fine French bistro.

The land is home to swimming ponies and a legendary 18th-century treasure.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

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

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

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

This collection of Neolithic monuments make up one of The U.K.'s richest archeological landscapes.

Believed to be the capital of the the ancient kingdom of Dál Riata.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

A hugely vast Irish landscape of barren rock that stretches for miles.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

One of Ireland's most infamous prisons for rebels including men, women and children.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

This former hub for crafty philosophers was founded by a writer who died aboard the infamous RMS Lusitania.

A natural gas leak provides a flickering flame beneath a waterfall.

A World War II-era submarine is stuck in the mud in New Jersey.

What remains of the simple red brick chapel where the women's rights movement began.