An early 20th-century bullring converted into a modern shopping center.

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

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.

The world's largest wooden structure.

This abandoned five-star hotel is now a five-star urban exploration destination.

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

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This statue honors the thousands of Allied avians that served and died for France during World War I.

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

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

A land of debatable treasure.

An eatery for UFO seekers on the Extraterrestrial Highway.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

There has been an astronomical clock on this spot since the 14th century.

This ancient theater was once the home of fierce gladiatorial battles.