This recessed garden protects thousands of mountain plants by creating its own microclimates.

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

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Abandoned railway line circling the city of Paris.

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

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

A modern-day Lascaux cave underneath Paris.

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

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

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

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

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

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

Indents in the pavement are all that remain from a grisly death machine in Paris.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

Beautiful views and Roman-style statues on the Italian coast.

A beautifully well-preserved ancient Roman villa.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This giant middle finger statue sends an unambiguous message to Italy's bankers.