Cities of the Underworld (2007)

Episode Overview

Beneath Sydney's bright exterior lies a shadowy history waiting to be uncovered. The depths of the city reveal a hidden world, featuring a 19th-century penitentiary, caverns that sheltered notorious outlaws, and abandoned gold mines. Additionally, former employees guide visitors through a clandestine World War II facility used for storing chemical arms, shedding light on the secrets that linger beneath the surface.