The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

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.

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

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

Strange masks and obscure costumes are housed in this old Madrid corrala.

A unique exhibit lets blind people experience famous works of art and architecture with their hands.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

A stately palace has been converted into the world's largest cannabis museum.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

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