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

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

Barça football fans might see the insignia hidden in a church window as a divine sign.

Peek into a cave of giant, glimmering crystals.

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

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.