Climb inside an iron crystal magnified 165 billion times its normal size.

A Gothic cathedral created from volcanic rocks.

Abandoned railway line circling the city of Paris.

This museum houses an imposing skeleton army comprised of creatures great and small.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

A museum of carnival attractions where you are invited to ride the rides.

France's most famous cemetery, with some of its most curious tombs.

How did a French journalist’s grave become the sexiest statue in the cemetery?

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

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

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 ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

Got apples?

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

The former global standard for the exact mass of one kilogram sits under lock and key outside Paris.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

Where Mary Shelley’s "Frankenstein" and John William Polidori's "The Vampyre" were born.