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

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

A Gothic cathedral created from volcanic rocks.

Traditional 11th-century outdoor tannery.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

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

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

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

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

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

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

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Dozens of snakes are housed and worshipped within the walls of this Vodun temple.

A monument to the more than one million enslaved Africans deported from the port of Ouidah.

Thousands of colorful pirogues showcase ingenious craftsmanship at the largest fishermen port in Nouakchott.

The quaint gallery displays works by artists from all across Mauritania.

Where thousands of slaves passed through the "Door of No Return."

The first mosque in Ghana is known as the "Mecca of West Africa."