A historic Christian shrine nestled within a spectacular natural cave.

Rejoice at Amsterdam's ‘pop temple,’ a former church reborn as a raucous music venue.

Marvel at this immense work of art that greets arrivals to the city.

Giant topiary dog once played a role in a terrorist bomb plot.

This deserted town in the hills of Croatia’s "party island" may have a scandalous connection to King Henry VIII.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

This ancient Roman aqueduct once funneled water to Diocletian's palace.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

This enchanting mountain plateau celebrates spooky local folklore.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This collection of solar timekeepers includes the world's first digital sundial.

The castle that provided the setting for much of 'Monty Python and the Holy Grail' is now a pilgrimage site for fans.

This astronomical clock is the second oldest in England.

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

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

This carved stone slab marked the grave of a local dragon slayer, who makes a killer pie.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

Go inside a revolutionary, cage-less zoo where 35 species live and some of them roam free alongside their human visitors.

One of England's most famous churches hides a pair of little known architectural treasures.

Blitzkrieg bop your way through Berlin's Ramones Museum.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

A beer pipeline runs beneath Bruges.