Rare karst landscape eroded from a flat seabed.

The highest peak in mainland Spain is said to be the final resting place of a Muslim king.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

A stone obelisk towering over the surrounding countrysides beckons hikers across the rolling moors.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Started as a kitchen garden, now the second largest botanical garden in the world.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A bizarre house filled with an astounding array of collections.

Moonbows over Kentucky.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The world's largest collection of witchcraft regalia.

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

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

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

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

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

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Countless grotesque faces stare out from this eerie Prague art wall.

Macabre astrological automaton clock dating to the late 1400s.

Walk behind a 50-meter-high waterfall.

England's most notorious suicide spot.