Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

This foolish Victorian sea fort was converted to a deluxe hotel.

This elaborate Byzantine-style building was designed for a not-so-pretty purpose.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

The stately remains of Llywelyn the Great's mighty fortress.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

England's most notorious suicide spot.

This enchanting hill is home to fairy lore and a sinister local mystery.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

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

A domino effect created with Britain’s iconic telephone boxes.

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

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

Three bridges straddle a stream, one stacked upon the other.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.