An ancient Egyptian temple in the middle of Madrid, Spain.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Science fiction's grandfather has a fittingly marvelous tomb.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

Giant topiary dog once played a role in a terrorist bomb plot.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.