Geological storytelling.

An abandoned Indian-inspired mansion.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

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

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

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

Stunning Roman aqueduct used for 1900 years and still standing.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

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

The world's largest wooden structure.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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 is expected to be completed in 2026—a century after the death of its architect.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

The oldest church in Inverness witnessed the brutal executions of many Scottish soldiers.