These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

Europe's official "zero-level," the equator of elevation.

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

A beautifully eclectic mix of architectural styles.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.