The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

The only subterranean ping pong table in Atlanta.

This angular brutalist playground turns playtime into modern art time.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

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

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

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

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

Got apples?

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

An odd museum dedicated to French fakes.

This hidden workshop is filled with molds of France's most iconic sculptures.

One of the last realized projects of an influential, self-taught, French Modernist architect Jacques Couëlle.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

A museum and doll store featuring a surreal and super sanitized version of where babies come from.

The fairy tale castle of the "fairy-tale king."

The world's first time capsule lies behind a welded steel door in Atlanta.

This former prison is an Art Deco masterpiece with a past full of civil rights flashpoints.

An unusual college football tradition involves burying pieces of sod from competitors' turf, replete with tiny coffins and headstones.

Though it's unclear why it's there, the lifelike sculpture of the giant lizard is oddly charming.

A natural history museum with an extensive collection of bird dioramas.