Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

A centuries-old forgotten underworld lies beneath Malta.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

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

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

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

An image of the legendary saint stands in the shadow of a cathedral she liberated.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

One of the great treasures of Neolithic art lies within this carefully constructed pile of rocks.

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

Folklore and history carved into Brittany's coast.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

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

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

This bridge was constructed from the rubble of the infamous Bastille.

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

A Gothic cathedral created from volcanic rocks.