Oldest Museum of the Netherlands is a true cabinet of curiosities.

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

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

The curios of pharmacist and collector Henry Wellcome.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

Finally, you don't have to be a pious Swedish seaman to relax like one.

An extraordinary house museum and cabinet of curiosities in the heart of Florence.

The oldest operating pharmacy in the world features 800-year-old recipes.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

The glowing blue Nymphaeum of Emperor Tiberius.

The Emperor Tiberius' palace of debauchery.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Some say this medieval church is where the poet Dante married his wife and also met the love of his life.

According to local folklore, this Roman sepulcher was once a throne for the Devil.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

The hallucinogenic center of the ancient world.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

Staves, storm-calling, and of course, necropants.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.