The Paris Catacombs

The 2014 horror film As Above, So Below introduced a lot of people to a part of Paris no one had ever seen before. There is a maze of catacombs filled with human remains beneath the city. 200 km of walls is covered in skulls and other bones. There is no map or predetermined route that can take anyone through the area safely because some have collapsed.

The ruins are what's left when former Parisian officials ran out of space above ground for them. The tunnels became the ultimate resting place for almost 6 million former people when cemeteries practically overflowed with bodies after bad weather led corpses to spill into the streets. Prior to that, limestone quarrying that began in the 13th century and connected quarries produced the tunnels.

Criminals and refugees have lived in the tunnels over time. Evidence of people entering tunnels that are supposed to be off-limits has increased in recent years. Officials once found a whole underground theater with 30 seats, a bar, and a café.