This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

A fantastic reconstruction of a 10th-century Viking longhouse.

Largest private bird collection in Iceland, formed from a tragic accident.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

An eerie, little-known Neapolitan museum filled with preserved human remains.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

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

Art and armour fill every inch of this rich kid's Italian villa.

The mummified relic of St. Antoninus.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

This museum is rotten with a century of wax medical deformities.

Secret refuge and museum of the Duke of Florence.

The largest and most famous wax anatomical collection anywhere in the world.

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

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

The middle finger of modernity.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

Giant marble phalluses on the sacred island of antiquity.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

The hallucinogenic center of the ancient world.

This legendary city has been a tourist attraction for centuries.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.