This waterfall, also known as the “the castanets” is said to mimic the sounds of the waves in Portugal.

A massive birdcage in this royal, 18th-century garden has sparked a local controversy.

This enigmatic Iberian sculpture of uncertain origin may have once guarded a burial site.

This 40-meter waterfall of light graces one of the most iconic stations in the Madrid metro network.

One of Madrid's most beloved statues is of an anonymous citizen.

A small but stubborn relic of Spain’s turbulent past hides in plain sight.

This modern sculpture looks out over the sea and amplifies sound from the inside.

A unique Baroque bridge preserved in Madrid's largest public park.

This medieval synagogue survived the Inquisition as a hospital and church.

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.