This futuristic observatory at the top of the Pyrénées offers unrivaled views.

Among the best preserved megalithic monuments in the Aragón river valley.

32,000 tiny soldiers are posed in 23 historical settings.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

Sanctuary on a ridge near an ancient shrine to a "Black Madonna" built by the founder of Opus Dei.

An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

Designed in the Romanesque style, this structure was once a fortress monastery.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

Abandoned Nazi train station turned underground astroparticle laboratory.

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