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

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

Inspired by Thomas Stothard's painting of the "Journey to Canterbury," albeit with Canterbury natives.

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

After protestors toppled a statue of a 17th-century slave trader, the pedestal where it once stood remains unoccupied.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

A small museum displays some of the artifacts discovered during a subway station renovation.

Dedicated to a young woman who broke gender barriers at the University of Madrid.

This fountain was designed to honor the man who helped bring water to Barcelona.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

The unfinished final resting place of some of Spain's most prominent politicians.

King Carlos IV laid the first stone during construction of this chapel.

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.

This Art Nouveau gate still stands at the former entrance of a 20th-century Spanish writer's colony.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

The remains of this misplaced church were moved here stone by stone.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

This sculpture of a rider on horseback once crowned the tomb of an Iberian aristocrat.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.