The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

France's high-tech, future-themed amusement park.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

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

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

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

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

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

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

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

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.

The world's largest reflecting pool is just two centimeters deep.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

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

Historic medieval fortified city in southwest France.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

France's national museum of scientific and industrial instruments.

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

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

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.