The world's largest wooden structure.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

The cathedral of a controversial, conservative, schismatic sect that declared the Catholic Church heretical and founded its own succession of popes.

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

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

The highest peak in mainland Spain is said to be the final resting place of a Muslim king.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

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

The hidden ruins of an old hydroelectric plant reclaimed by nature.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

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