A modern-day Lascaux cave underneath Paris.

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

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

A surrealist timepiece by the artist of melting clocks.

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

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Paris' linguistic guide to the international language of, yes, love.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

Notorious artist squat renovated into legal studios.

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

This colorful statue welcomes visitors to a Barcelona park.

Barça football fans might see the insignia hidden in a church window as a divine sign.

An early 20th-century bullring converted into a modern shopping center.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

A temple to modernity, tucked away amid Barcelona's more well known museums.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

Turntable anonymously received orphans, alms, and groceries.