Huge Russian Orthodox cemetery in danger of being converted into open public space.

Shattered columns and Egyptian pyramids outside of Paris.

The post-apocalyptic remnants of a bucolic town ruined by a plane crash.

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

Perfume museum and library.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

Ghosts of France's colonial past.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

Experience architect Le Corbusier's modernist design for living in the home he designed for himself.

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

Abandoned railway line circling the city of Paris.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

A modern-day Lascaux cave underneath Paris.

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

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

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

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

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

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

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

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

Egyptian Revival movie palace abandoned for decades and restored in 2013.