A network of hundreds of interconnected wineries in caves hides under the town center.

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

A historic Christian shrine nestled within a spectacular natural cave.

A celebration of solstice followed by a fiery purging of evils.

This imposing modern citadel started out as a home renovation project.

An archeological treasure trove stumbled upon by a couple of children.

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

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

An abandoned Indian-inspired mansion.

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

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

A micro-communist utopia in Spain with no police, no mortgages and full employment.

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

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

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

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

An eerie collection of the surviving structures from a past celebration of the future.