"These are the photographs of François Klein, a German photographer who says he dives into his subject’s environment to produce honest pictures. And dive he did, 35 meters below Paris, documenting the newest generation of catacomb explorers he calls, the “Underground Pirates“. It can take years to break into the codified micro-community that calls themselves the cataphiles. Most cataphiles won’t even tell close friends and family about their nocturnal habits; the people they spend the day with have no idea they regularly disappear down manhole covers at night to retreat from the city and explore the complex web of tunnels and chambers. These nocturnal habits are absolutely illegal, but that’s not the only reason why they remain such a closely guarded secret…" ‎- JustDuckie