Ancient human remains unearthed around the iconic monument.

Famously misunderstood wonder of the ancient world

Seat of the Duke and Duchess of Devonshire for centuries.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Scattered throughout London are ancient remnants of the city's former bounding wall.

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

The modern birthplace of Irish freedom.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

The ruins of a medieval monastery named after a type of tree.

The house where the writer spent his formative years.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The ancient tomb acts as a calendar that keeps perfect time.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

Kentucky's longest operating jail is now a spooky spot to spend the night.

A full-scale replica of a 1774 colonial settlement in Kentucky.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This huge clock made of flowers and simple machinery was once used a political weapon.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.