Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The "dragon babies" of southeastern Europe.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

The curios of pharmacist and collector Henry Wellcome.

One man's ambition created this psychedelic log home.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

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

Surreal riveted sea forts once protected the Kent shores from German attack.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

The site of the climactic scene from the classic horror film is now a historic landmark.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This attraction was abandoned after the Chernobyl disaster.

"Looks so real, it's scary!"

The first declared National Monument in the United States.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.