An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

Hundreds of caves once used to store grains and animal feed.

This 7,000-year-old megalithic wonder covered by a Franco-era reservoir emerges in times of drought.

A historic Christian shrine nestled within a spectacular natural cave.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

This small museum tucked within a subway station holds pieces from Madrid's past.

An archeological treasure trove stumbled upon by a couple of children.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

Geological storytelling.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

Seaside ruins of a settlement that date back to the first century B.C.

This species of wild goat stars in witchy legends and frolics among the park's eerie rock formations.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

An abandoned Indian-inspired mansion.

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

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.