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

The last bastion of Roman presence north of the Alps looms over a German town.

The Devil’s own choice when he needs a drink in Brussels.

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

Meet the bronze beloved pet to a family of famous peeing statues.

Brussels' favorite peeing boy has a sister.

Drink among marionettes at this pub inside a historic puppet theater.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A 200-year-old collection of oddities and medical paraphernalia.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

These bleak 800-year-old ruins were once the royal residence of choice for hunting in Sherwood Forest.

After public executions took place at this location, attendants would also attend a local horse race.

The final resting place of England's most notorious bandit.

The remains of a Dominican friary, once one of the largest of its kind in the United Kingdom.

Hundreds of years ago, this lion-shaped door knocker could help a person accused of a crime find temporary safe haven in Durham Cathedral.

A rather grand, but tiny, folly on the banks of the River Wear associated with a Polish count.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

A memorial to the beloved brown bear that served in the Polish army during World War II.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.