Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

Cliffside houses provide a spectacular view from their perch above the valley.

An early 20th-century bullring converted into a modern shopping center.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Stunning Roman aqueduct used for 1900 years and still standing.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

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

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

This cemetery features modernist statues as strange as its name.