These fantastically named natural pools look like something out of a Scottish myth.

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

A boulder in the Churchyard of Down Cathedral marks the legendary burial place of "The Apostle of Ireland."

These murals stand as reminders to the troubled history of this Northern Ireland city.

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th-century.

These barriers stand as stark reminders of Northern Ireland's troubled past.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

Every year locals give the bear a fresh coat of paint to preserve its signature goofy grin.

The ruins of a once-grand mansion in Northern Ireland are now thought to be haunted.

The inscribed stone at Kilnasaggart is a remnant from nearly a millennium ago.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

A museum marks and documents the site of the Titanic's launch.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The atmospheric road was never meant to be so creepy.

This incredible collection contains rare steam-powered engines, rides, and trains.

To literally keep their waste out of their own backyards, the citizens of this English city built an impressive sewer system that is still in use today.

The natural history museum displaying the British bird collections and dioramas of Edward Booth, free of charge.

An abandoned World War II tank left to rust in the downland.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

An unsanctioned shrine that sprung up outside the late singer's home is causing a stir in London's Highgate neighborhood.