A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

Hundreds of hidden passageways weave through the old quarters of Lyon.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

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

This semi-secret storybook hedge maze is also the oldest garden in the city.

Mountain where Jesus was first tempted by the Devil.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

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

This Swedish automobile graveyard is a beautiful gallery of decay, but woe be to any who would steal a souvenir.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Limestone grottoes turns everyday objects into stone.

France's Lilliputian park displays over 100 of the country's monuments for visitor perusal.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

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

The Argonaute submarine was the French navy's pride and joy in the 1950's.

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

Historic medieval fortified city in southwest France.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

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 first green space constructed on an elevated viaduct.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.