This seaside sanctuary was once one of the most important religious sites for women in ancient Greece.

Town of spiritualists and mediums in Florida.

Flip your own pancakes in this old sugar mill within a Florida state park.

Longest fortress system anywhere in Europe.

This railroad track was so secretive that it was omitted from all maps.

This runestone once destroyed by an explosion has been painstakingly reassembled to save its history.

Micro-nation based around a nine-story high illegally built tower.

A copy of the brutal decapitation device that predated the French Guillotine by about 200 years.

Dedicated to the history of mining and minting in a region rich in silver and radium.

An Art Nouveau building covered in animal gargoyles and grotesques.

The Goose Girl of Göttingen, Germany might well be the most kissed girl in the world.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

A former Roman town that was once the home of Scipio Africanus.

Hidden in the forest are the crumbling, graffiti-covered remains of the factory where most of Germany's explosives were produced during World War II.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

What was once England's second-richest abbey is now a haunting ruin.

Britain’s highest medieval monastery is a remote ruin nestled at the head of a valley 1,240 feet above the sea.

The remains of a magnificent medieval fortress that was the capital of a vast empire.

Featured in one of the most iconic scenes in cinema history.

This hidden fortress has been coined the "City of Ghosts."

A tribute to a Ukrainian heroine who went undercover and killed several Nazi operatives.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.