Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.

This historic electric train has operated with regularity since the early 1900s.

An uninhabited village that preserves and documents rural architecture and an endangered way of life.

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

The young girl gained fame for her atypical size and was regarded as a curiosity by the Spanish aristocracy.

This historical manor is complete with a magnificent garden.

A historic castle that served as a backdrop to part of an elaborate extraterrestrial hoax.

This tunnel was built in order to protect the village of Daroca from flash floods during rainy seasons.

Spain's largest bullring offers a unique glimpse at architecture and history.

The cave where Saint Genadio meditated and played chess.

The former home of a conniving 17th century politician is now a high-end hotel.

Built to power trains, the engines in this building provided the entire city of Madrid with electricity during the Spanish Civil War.

This ancient amphitheater was restored in the early 1990s.

This Roman arena once played host to bloody gladiatorial battles.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

A signal indicates the entrance to this alley, rumored to be a meeting place for witches.

Experience this Iron Age village the way that its original residents would have.

A bronze sculpture of a monkey sits outside this factory, which has made an anise-flavored liqueur for over 150 years.

The grotto where Saint Ignatius of Loyola lived as a hermit for nearly a year.

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

This former power station is now a museum dedicated to the region's coal-producing history.

An automaton perched above an classic clock and watch store

A surrealist labyrinth and museum of contemporary sculptures.