Over 4,700 miles of trees being planted to hold back the desert.

Houses are tucked between, on, and underneath giant boulders.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

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

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

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

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

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

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

This ancient Spanish castle sits high upon a hilltop.

Rare karst landscape eroded from a flat seabed.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

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

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

The final resting place of the great navigator, or maybe his brother.

A landscape decorated with enormous skull sculptures.

Bacteria and algae give the salty water its bubblegum hue.

An isolated village literally built into the crevices and rock formations of a mountain.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.