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

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

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

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

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

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.

Northern Ireland's Brobdingnagian stepping stones.

In the quiet village of Fulmodeston, the ruins of a medieval church remain hidden among vines and foliage.

The ruins of a Roman fort lie in the shadows of an imposing medieval castle.

These ancient ruins were the final resting place of King Henry II's mistress.

This melancholy headstone is the only remaining evidence of a medieval church lost to the sea.

This grand Georgian manor house was converted to serve as an isolation hospital before it was abandoned and destroyed.

A witch wreaks ruinous revenge on this ancient church with her "enchanted leg."

A deserted medieval village where bodies were once mutilated to prevent them rising from the dead.

It's believed emperor Hadrian himself funded this once architectural wonder.

The ruins of a 19th-century corn mill are haunted by a malevolent cave-dwelling spirit.

This 20th-century replica of a 13th-century castle has itself fallen into ruin.

The former "holiday home" for monks at the Durham Cathedral.

This modest relic, with rich history as a strategic fort through multiple eras.

A open air theatre built on a cliff by an eccentric British woman.

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

19th century tunnels burrowed under Liverpool.