Now in ruins, this abbey was the home of Tironensian monks for more than 400 years.

The castle that provided the setting for much of 'Monty Python and the Holy Grail' is now a pilgrimage site for fans.

The long-lost final resting place of an accused witch.

This 19th-century sanctuary was built atop a hill that once housed a Roman fort.

The ruins of a 15th-century castle that has seen its fair share of bitter feuds.

This standing stone has a unique backdrop thanks to some of the United Kingdom's best-rated beaches.

It's said this was once the home of King James V's pet lion.

The ruins of a 12th-century seaside castle on the southwest coast of Scotland.

Named for its similarity to the tip of a violin's bow, this striking formation was created by millions of years of erosion.

Legend has it that a Dutch fisherman lost control of his Shetland pony and tumbled from this cliff.

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

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

This impressive midden of scallop shells apparently all comes from a single fishing company.

If you fly into Edinburgh Airport, it's possible to spot this prehistoric site without even getting off the plane.

Although it appears much older, this castle-like tower is actually a Georgian-era folly.

Believed to be the birthplace of John Balliol.

A solemn memorial in a majestic setting that honors a 1692 tragedy.

Once considered one of the country's finest motte and bailey castles.

Even though some of the buildings date back to the Victorian era, this research institute is still involved in cutting-edge astronomy research.

British Empire's last territorial expansion, claimed by four countries.

Cut into a sheer cliff face, these stairs are the only way to reach a secluded Scottish harbor.

Near this coastal cave stands a small memorial to the hermit who made it his home for three decades.

The overgrown ruins of this once majestic castle sit forlornly in the Scottish countryside.

Visible at low tide, this rusting vessel is one of the last surviving examples of the X-Class "Midget" submarines.