This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

French commune at the heart of conspiracies.

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.

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

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

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

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

Wonderland replication in progress by one persistent man.

Village situated on a narrow volcanic escarpment.

Religious dwelling in a Spanish volcano.

This amazing piece of modern art honors the hundreds of fishermen killed during Cambrils' "year of misfortunes."

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

Museum of amazing old toys and automata.

Stunning Roman aqueduct used for 1900 years and still standing.

A modernist church in an ancient village.

Super Robot anime statue guards a forgotten suburban development in Tarragona.

A Romanesque tower appears when water levels drop.

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

Replica of Seville, Spains famous Giralda, a former minaret converted into a bell tower.

Living towers made of people that are now recognized by UNESCO.

A local artist created this giant rippling wave.

A Spanish forest is filled with mysterious stone carvings.

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