Catacombs

The catacombs were a massive structure built by The Family, a secret society which made Tall Oaks their home centuries ago. They were built beneath Tall Oaks Cathedral, and directly above and linking to a cavern where the city's underground water flowed.

History
The catacombs were used primarily for the secret burial of thousands of members of the secret society, but in the 21st century gained new use as a testbed for C-Virus bioweapons development. Following completion of the project, the catacombs were abandoned and the bioweapons released, allowing hundreds of preserved corpses to be revived by the C-Virus as Zombies. They were later killed once more when the catacombs began collapsing.