French commune at the heart of conspiracies.

Small French town or alien garage?

Historic medieval fortified city in southwest France.

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

The world's largest wooden structure.

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

Spain's largest bullring offers a unique glimpse at architecture and history.

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

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

A Spanish town built into the cliffs.

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

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

This giant radio telescope would be a rusting ruin if it hadn't become such a beloved relic.

Home to the world's oldest functioning orrery.

A bizarre form of natural mummification was discovered in the church of this Frisian village.

This steel frame is a skeletal mirage of a lost 16th-century stone building.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

Remarkably preserved body discovered in a peat bog.

The hallucinogenic center of the ancient world.