Giant topiary dog once played a role in a terrorist bomb plot.

The site of a legendary battle immortalized in medieval literature.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

Abandoned Nazi train station turned underground astroparticle laboratory.

A museum of tiny buildings in the tiny country of Andorra.

This 15th century pharmacy displays a beautiful collection of ancient medicine jars.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Designed by Gustave Eiffel before his famed tower.

Mountain where Jesus was first tempted by the Devil.

Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

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

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

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Long tunnels run under the ancient chariot racing circuit to the tower.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

This Roman arena once played host to bloody gladiatorial battles.

Stunning Roman aqueduct used for 1900 years and still standing.

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

The magnificent sanctuary is Spain's first purpose-built structure of its kind.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

Fascinating exhibits of prehistoric and ancient artifacts displayed with a uniquely modern touch.