A wonderful safe haven founded in the 1960s to rescue endangered monkeys from the pet trade.

The remains of one of Wales’ great medieval buildings, with a pub in the cellar.

In 1977, an eccentric book lover formed a micronation for book lovers.

At this Nashville restaurant, cheese and charcuterie arrive via conveyor belt.

A fake block of cheese remembers a feat of dairy engineering from the Chicago World's Fair.

A 22-million-year-old sandstone cave is a natural habitat for award-winning cheese.

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

These quaint French houses dangle precariously over a precipice.

The people's champion of the French Revolution was so overcome by grief at his wife's death that he exhumed her in the dead of night to make one final replica of her face.

An architectural oddity of six stories, accessed by graceful ramps.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

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

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

This historic Benedictine monastery brews a booze so toxic that it has often been blamed almost singularly for Scottish hooliganism.

The highest peak in all of England is plagued by dangerously fickle climate shifts.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

During this yearly Welsh swimming race, competitors tread through the fetid waters of a bog trench.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Go deep down into the earth to experience the world of Welsh coal miners.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

The UK's oldest theme park slowly slips away.

Hear the quietest sound from across the dome.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Hundreds of hidden passageways weave through the old quarters of Lyon.