What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

This German bone house contains the remains of some 20,000 souls.

The first recognized Neanderthal remains were found in this now-lost cave in 1856.

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

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Wooden pathways run through this rocky landscape, which legend says was created when a dwarven king pulled down his own castle to stop raiding giants.

Amsterdam's Red Light District leaves little to the imagination.

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

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

This subterranean studio is filled with fascinating kinetic art.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

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

The history and future of cannabis.

The attic of a four-century-old canal house hides a clandestine church.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

A floating cat sanctuary on an Amsterdam canal.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

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

The world's only museum devoted to the wonders of fluorescence.

The trials and tribulations of marking Poe's grave.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

The crumbling remains of a once-grand building.