Passages below Okla. city were filled with a rarely-seen Chinese community. Anti-Chinese sentiments drove the culture underground across the country, including Oklahoma City. During a flu epidemic during the 1920s, health inspectors stumbled across the Chinese underground. After their inspection, the inspectors were quoted as saying the nearly 200 residents were “in good health and surroundings and sanitary as all get out.” An entire network of tunnels downtown that link various buildings t