An Antoni Gaudí masterpiece in Astorga.

"Alleys of Stone" form natural mazes in Spanish natural park.

Geological storytelling.

Walls of stone rise up from sinkholes caused by underwater erosion.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

One of the most important Celtic-Roman archaeological sites in Spain.

Two large eyes painted anonymously on a mountain overlooking the city pay homage to an old legend.

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

This museum is known as the "Land of the Dinosaurs," but its full-scale dino models are just the start.