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

Commonly acknowledged as the only public monument to the Devil himself.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

One of the world's largest collections of rare medical texts and ephemera.

This mesmerizing kinetic sculpture blossoms endlessly in the breeze.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.

This museum covers 10,000 years of Pre-Columbian Latin American history.

A museum founded to reflect on and remember the human rights abuses under Chilean dictator Augusto Pinochet.

What was once a unique system of urban elevators is turning into a mechanical ruin.