This small Bavarian graveyard is filled with empty graves for German soldiers lost during the World Wars.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

The world's oldest known salt mine.

An Austrian house of bones filled with hundreds of intricately painted skulls.

This vast collection of smoking pipes from across the world spans centuries.

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

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Amsterdam's former hotspot for public executions and dissections.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

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

A floating cat sanctuary on an Amsterdam canal.

Museum preserving torture methods from the past.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

The amazing wonder cabinets of a very rich Austrian archbishop.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

A ruined castle stands atop a hill surrounded by dragon lore.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.