Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

A Spanish town built into the cliffs.

A Gothic cathedral created from volcanic rocks.

Sculpture of a legendary French dragon.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

A unique seaside cave where Aleister Crowley faked his own death.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

Single runway interrupted by a busy road that cuts across its middle.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's tallest bridge is also possibly the most elegant.

The world's most famous cheese caves.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

Rare karst landscape eroded from a flat seabed.

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

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

An eclectic collection of thousands of items owned by the sculptor Frederic Marès.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

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.

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

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

32,000 tiny soldiers are posed in 23 historical settings.