A thorough look at the development and history of the underground's rolling stock of the Madrid subway system.

A unique exhibit lets blind people experience famous works of art and architecture with their hands.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

An iconic photograph from the Spanish Civil War saved this shrapnel-scarred historic house from destruction.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

This building was designed to celebrate Italy's victory in World War I.

This Torino museum honors a soldier who kept the city safe using barrels of exploding gunpowder, losing his life in the process.

A landmark in the history of technology and computing is hidden in a tiny Baroque chapel.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

This peculiar Italian elevator runs both horizontally and vertically.