For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

The streets of a sleepy Spanish town proudly exhibit some of the world's finest graffiti.

This influential Renaissance-era library was once the haunt of kings and monks.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

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

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Spain's stunning solar energy plant.

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

This embalmed man is one of the best preserved mummies from the Canary Islands.

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

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

Giant granite sculptures representing family on the northern coast of Spain.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

A science fiction-inspired apartment building designed by a famous Spanish architect.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

This 18th-century project to build the world's tallest gravity dam was never completed.