Two small chapels housed inside an ancient tree.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The world's largest collection of witchcraft regalia.

Remnants of a Victorian garden feature sitting in public woodland.

"The most colorful grottoes of the world.

Ride a dragon train into a world of dwarves.

The fairy tale castle of the "fairy-tale king."

A beautiful maze marks where three countries meet.

Fascinating town where normal life interfaces with the occult.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

Famously misunderstood wonder of the ancient world

Northern Ireland's Brobdingnagian stepping stones.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Modern sundial uses ancient methods to tell time and date perfectly.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The world's largest model of our planetary system.

Peek through a transparent pyramid and drink in the mountain made of books.

Museum preserving torture methods from the past.

A curious collection dedicated to human and animal anatomy and pathology.

Walk 2,300 feet above the ground on the "Troll's Tongue."

A fiery crater has been burning in the Karakum Desert since 1971.

A massive underwater sinkhole made famous by Jacques Cousteau.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.