A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

The oldest residential street in Europe also features an optical illusion.

Only 68 people per day are allowed to visit this New Zealand bird-watcher’s paradise.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

Fascinating town where normal life interfaces with the occult.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

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

The decaying ruins of Wales' first asylum for the mentally ill.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

The longest hedge maze in the world.

Famously misunderstood wonder of the ancient world

A fantastic castle rumored to be the birthplace of King Arthur.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

New Zealand's only running funicular railway.

At just 51 feet and 10 inches long, it's the shortest street in England.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.