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

A house covered entirely with shells.

A spectacular walk on the flank of a gorge.

A contemporary art installation housed within a Gothic cathedral.

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

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

Cliffside houses provide a spectacular view from their perch above the valley.

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

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

Mountain where Jesus was first tempted by the Devil.