The geomorphology of the Turia Valley could easily be mistaken for Utah or Arizona.

For many years, the origin of these enigmatic artificial caves was the subject of debate among historians.

This "grandfather" eucalyptus is one of the tallest trees in Europe.

This 18th-century water provider for Aranjuez was refurbished in 2013 only to be neglected again.

A series of colorful murals breathes new life into old grain silos in Spain.

An underground spring in a labyrinthine cave system, decorated with stalagmites and stalactites.

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

An old quarry transformed into a recreational and cultural space.

This centuries-old tower hosts endangered bald ibis mating pairs and looms over a pristine beach.

An ancient stone structure that, according to legend, was built by witches.

Built in 1925, this glass-roofed shopping arcade is known for its modernist Italian architecture.

The largest and best preserved necropolis in the Western Mediterranean.

This beloved ancient tree is the pride of this city center.

An Antoni Gaudí masterpiece in Astorga.

Designed by Gustave Eiffel before his famed tower.

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

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

The longest eruption in the history of La Palma originated with this volcano in September 2021.

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

Marvel at this immense work of art that greets arrivals to the city.

The history of this Moorish castle includes royals, a Mexican-Spanish association, and several attempts at lodging.

Tower that was a frequent stop on the travels of King James I.

The ruins of the second-largest circus school in the world.

A reservation-only highland forest reserve of endangered Pinsapar firs stands above a village in Andalucía.