A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

The fragmented remains of a massive public bath connected to the city's water supply.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

Inaugurated three times, this tower offers some of the best views of Madrid.

Nicknamed the "Spirit of Paul Klee," this colorful apartment building features an array of multicolored panels.

This postmodern apartment block was designed to be a vertical neighborhood.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A lush indoor jungle fills this bustling Madrid transportation hub.

Outlaws, hot springs, and tragedy have all left their mark on this ancient road in the Icelandic highlands.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.