The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

An alchemist's "magic door" stands in the middle of a Roman park.

This observatory within Europe's first dark sky park offers stunning views of the night sky.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

A Scottish manor with a history of mysterious fires, magic, and eccentric tales

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

A pagan tradition of draping trees with rags eerily lives on.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A 30-acre garden inspired by the principles of modern physics.

360° views of the city plus five floors of optical illusions and hands-on science.

These fantastically named natural pools look like something out of a Scottish myth.

An industrial site turned into Hungary's most cherished natural wonder.

Festival of Perpetual Life and Rebirth.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

Once the home of a hermetic monk, this cave now houses a small church.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.