This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

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

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

Once a resting spot for King Fernando VII.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Commonly acknowledged as the only public monument to the Devil himself.

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

A fantastic Christmas tradition where defecation meets the manger.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

This tiny cafe is one of the last meeting places of its kind, allowing revolutionaries a place to plot.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

This ancient Roman town was revered for the healing waters of its sacred spring.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

A miniature city, once ruled by the Queen of the Netherlands.

This antique farmhouse is one of Læsø's rare seaweed houses.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

A hugely vast Irish landscape of barren rock that stretches for miles.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.