Paris' linguistic guide to the international language of, yes, love.

The oldest stone house in Paris was built by its most famous alchemist.

This massive library holds what was once the largest book collection in the world.

Abandoned railway line circling the city of Paris.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

Replicas of fossils unearthed during renovation work reveal how this area would have looked millions of years ago.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

Not far from Madrid, a set of perfectly preserved trenches date back to the Spanish Civil War.

The unfinished final resting place of some of Spain's most prominent politicians.

A model solar system adds a celestial touch to this suburban park.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

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

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

The lengthy skeleton of one of the tallest Spaniards of all time is on display in Madrid.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

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

This generously endowed statue once stood guard outside a Roman home.

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 once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

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