This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

A stunning Victorian abbey and walled garden on a lakefront.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

A diminutive, thousand-year-old church believed to be the smallest in Ireland.

A tongue-in-cheek marker at the place where Robert Barr supposedly created Scotland’s favorite soft drink.

On this spot Lord Kelvin allegedly discovered absolute zero.

The longest staircase lock in Britain.

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

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

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

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

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

This Neolithic-era complex boasts standing stones, a cairn, and the only henge in Western Scotland.

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

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

Dating back roughly 240 million years to the Triassic period, it was left by a large, 12-foot-long crocodile ancestor called a Chirotherium or "hand-beast".