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

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The anatomical-pathological collection of a man who changed surgery.

Climb inside an iron crystal magnified 165 billion times its normal size.

Cozy basement bar sports an inventory of over 2,000 beers.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

One of Ireland's most infamous prisons for rebels including men, women and children.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

A little sculpture with a large wardrobe.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Sweden's oldest animated sign is still lighting up the skyline today.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

This disused church, left to the elements of the Arctic Circle's forests is open for exploration.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

A former plague hospital turned medical museum.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Christ's blood preserved in a Belgian town.