A relic of World War I that now exist as a piece of public art.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

The remains of a convent turned military barrack in the heart of Madrid.

This 18th-century pond is one of the main attractions in the Jardín del Príncipe in Aranjuez.

Once a resting spot for King Fernando VII.

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

This modernist bridge highlights the bear as a symbol of Madrid.

This little sun pays homage to a massive gate that once stood at this location.

With a facade that measures just 107 centimeters, this five-story building is one of the skinniest in Europe.

Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Known as the Casa de las Siete Chimeneas, this haunted 16th-century manor has a dark, mysterious past.

Meant to resemble a massive tree, the building is the best example of Spanish organicist architecture in Madrid.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

This small museum tucked within a subway station holds pieces from Madrid's past.

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

One of the best examples of the modernist movement in Madrid.

The medieval woodcut-style artwork chronicles life in medieval London.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

This ancient Egyptian obelisk still bears the wounds of World War I.