One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

You can soak in three relaxing pools filled daily by the tide.

A cheese discovery made by shepherds became the pride of a region.

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

A celebration of solstice followed by a fiery purging of evils.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

A charming Spanish village sits atop this natural limestone overpass.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

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

A Spanish town built into the cliffs.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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

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

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

Bacteria and algae give the salty water its bubblegum hue.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

An ancient Egyptian temple in the middle of Madrid, Spain.

This semi-secret storybook hedge maze is also the oldest garden in the city.