A hidden medieval crypt where a famous legend says the devil used to teach black magic.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A beautiful but toxic fountain of mercury.

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

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

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

A small but charming botanical garden that contains many exotic plant species.

Elaborate tile work in this railway station tells the story of Portugal.

The stunning interior of this Gothic church is covered in ornate gold details.

A growing popular hipster market with over 100 local specialties and live music.

Nelson Mandela lived here with his family from 1946 until his arrest in 1962.