This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

The earliest known map to show America, discovered by accident at a Paris bookshop.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

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