Stormy conditions send jets of seawater bursting through holes in the cliffs.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

Spain's stunning solar energy plant.

A spectacular walk on the flank of a gorge.

A celebration of solstice followed by a fiery purging of evils.

Five million people are laid to rest here, more than the population of Madrid itself.

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

Remains of the lost church hide beneath this Spanish Parliament building.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

Dunk your churros in rich hot chocolate on the city’s old “Chocolate Street.”

A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

A Spanish artist builds his own castle.

You can soak in three relaxing pools filled daily by the tide.

A micro-communist utopia in Spain with no police, no mortgages and full employment.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.

The unexpectedly beloved remnants of a controversial thermal power plant.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Seaside ruins of a settlement that date back to the first century B.C.