An important pilgrimage site for pagans and early Christians, named for a Celtic goddess-turned-saint.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

Native Americans built this circle of stones, which was used to predict astronomical events.

Hidden in the hills is a mysterious stone structure, known only to a few.

The largest earthwork effigy in the world.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

The location of the last witch trials of Italy, known as "The Salem of Europe."

The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

The world's largest collection of witchcraft regalia.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

This historic graveyard monument is dedicated to a tragic victim of witch trial hysteria.

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

This French "sea of rocks" is packed with stunning rock formations and its own medieval castle.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

These spooky and unusual stone formations create an underworldly landscape.

Swiss vineyards in a UNESCO heritage site.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.