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

Bacteria and algae give the salty water its bubblegum hue.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

A lush indoor jungle fills this bustling Madrid transportation hub.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

An ancient Egyptian temple in the middle of Madrid, Spain.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This semi-secret storybook hedge maze is also the oldest garden in the city.

A beautiful but toxic fountain of mercury.

A beautiful drive through the foot of the Alps traces the path of 15th-century Turkish raids.

Nibble as you learn about Slovenia's longstanding tradition of making beautiful honey cookies.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

A crumbling World War I fort that is reached through a series of concrete tunnels.

A miniature train-ride through Slovenia's largest cave system.

The "dragon babies" of southeastern Europe.

A whimsical bridge adorned with decorative dragons.

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

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

This massive subterranean fissure is known as the "underground Grand Canyon."

A monument to the bloody fight against fascism in Slovakia during World War II.

This region of Slovakia boasts some of the most plentiful opal mines in the world.

An unusual cave filled with rare alien-looking aragonite formations.

The ruins of a 13th-century monastery that long served as a place of refuge from wars and raids.

Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.