The world's most elegant power lines.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

Spain's stunning solar energy plant.

A Spanish artist builds his own castle.

An old wool-washing house filled with Fluxus contemporary art.

Fragments of human bones are embedded in the walls of this quaint alley.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

An impressive home made of stone, carved more than a century ago.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

This modern district offers a stark contrast to Bordeaux's terrace-lined squares and waterfront façades.

Beneath the city of Lourdes, France is a massive, concrete church.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

For more than half a millennia, this automaton has rung an hourly bell.

A modern and feminist reinterpretation of the famous Wallace Fountains.

The stunning interior of this Gothic church is covered in ornate gold details.

Ancient catacombs form the foundation for this Rococo orgy of a church.

Picturesque intersection of witchcraft and ancient Christianity.

One of the largest Roman settlements in Portugal.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

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.

For more than two centuries, the canopy of this venerable tree has been a haven for songbirds and lovers.

Perhaps the most spectacular grotto along the Algarve coastline.