The hallucinogenic center of the ancient world.

The world's most famous cheese caves.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Hundreds of boat-shaped headstones fill this graveyard as part of a centuries-old custom with mysterious origins.

Take a hike to this unique rock formation formed by lava flows.

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

A hugely vast Irish landscape of barren rock that stretches for miles.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

A stunning Victorian abbey and walled garden on a lakefront.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

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

This public elevator links the lower city to the upper city of Salvador.

This medieval cathedral houses stained-glass windows featuring saints and pretzels.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

An industrial relic is now one of Europe's most staggering art spaces.

This former steel and coal plant is now a neon-lit industrial fantasia.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.