This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

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

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

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

The world's largest wooden structure.

Village situated on a narrow volcanic escarpment.

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.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

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

Mountain where Jesus was first tempted by the Devil.

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

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A beautiful but toxic fountain of mercury.

It's believed these prehistoric individuals were the victims of cannibalism.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

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