Religious dwelling in a Spanish volcano.

This 47-story "M" needed 20 years to be completed

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

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

Rare karst landscape eroded from a flat seabed.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Bacteria and algae give the salty water its bubblegum hue.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Mountain where Jesus was first tempted by the Devil.

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

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.