The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

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

King Carlos IV laid the first stone during construction of this chapel.

Peek into a cave of giant, glimmering crystals.

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

This mansion oasis contains gardens, sculptures, and fountains just off the busy Plaça Kennedy in Sant Gervasi.

An archeological treasure trove stumbled upon by a couple of children.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

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

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

A 16th-century Andalusian palace.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Wonderland replication in progress by one persistent man.

Bacteria and algae give the salty water its bubblegum hue.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

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

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.