Built in 1547, these ruins lie on a rocky promontory in Ballintoy jutting into the wild ocean waters below.

Northern Ireland's Brobdingnagian stepping stones.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

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.

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

The longest staircase lock in Britain.

A close look reveals that the Scottish monument is just slightly off-kilter.

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

An exceptional engineering feat that facilitates the migration of salmon upstream during their breeding season.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

A double cantilever system bridge that was designed to prevent flood damage.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

Inside a Scottish castle hangs the tattered remains of a flag with murky origins and supposed magic powers.

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

Ancient cliffs resembling a kilt on Scotland’s second-largest island emit an entrancing sound.

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

This ruined castle is said to be the legendary keep of a Viking princess.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The location of this historic castle was inspired by a donkey.

These ruins saw a second life as a cemetery.

This rock bore witness to the last pitched battle fought on British soil.